Thulium is an easily workable metal with a bright silvery-gray luster. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin. Schematic electronic configuration of rubidium. Oxygen is a chemical element with atomic number 8 which means there are 8 protons and 8 electrons in the atomic structure. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). Seaborgium: Value is a guess based on periodic table trend. Hence the electron configuration for rubidium (Rb) in noble-gas notation is [Kr] 5s1 Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. The chemical symbol for Actinium is Ac. Bromine is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas. Silicon is a chemical element with atomic number 14 which means there are 14 protons and 14 electrons in the atomic structure. Lutetium is a silvery white metal, which resists corrosion in dry air, but not in moist air. Rubidium is no exception to this rule, being silvery-white and melting at 39 ºC. Electron Configuration Practice # Element symbol Atomic # Longhand EC Valence e- 1 As 2 Ar 3 Mn 4 Ca # Element symbol Atomic # Shorthand EC Valence e- 5 K 6 Al 7 Xe ... [Rb] 5s24d9 # Element symbol Atomic # Longhand /Shorthand EC Valence e- 8 1s2 2s2 2p6 3s2 3p5 Specialty glasses, which constitute the leading market for rubidium, are used in fiber optics telecommunications systems and in night-vision devices. Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure. It is a lanthanide, a rare earth element, originally found in the gadolinite mine in Ytterby in Sweden. Full electron configuration of rubidium: 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6 5s 1. In exercise 7, write the complete electron configuration for each atom. In doing so, we obtain three quantum numbers (n,l,m l), which are the same as the ones obtained from solving the Schrodinger's equation for Bohr's hydrogen … Nobelium is a chemical element with atomic number 102 which means there are 102 protons and 102 electrons in the atomic structure. The Kossel shell structure of rubidium. Radon is a radioactive, colorless, odorless, tasteless noble gas. Cobalt is a chemical element with atomic number 27 which means there are 27 protons and 27 electrons in the atomic structure. Like the other metals of the platinum group, ruthenium is inert to most other chemicals. The chemical symbol for Tungsten is W. Tungsten is a rare metal found naturally on Earth almost exclusively in chemical compounds. The chemical symbol for Promethium is Pm. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. The chemical symbol for Rubidium is Rb. The chemical symbol for Nobelium is No. a. Tellurium is a chemical element with atomic number 52 which means there are 52 protons and 52 electrons in the atomic structure. Mercury is a heavy, silvery d-block element, mercury is the only metallic element that is liquid at standard conditions for temperature and pressure. Notes on the Electron Configuration of particular elements: Dubnium: Value is a guess based on periodic table trend. H #1s^1# He #1s^2# Li #1s^2 2s^1# Be #1s^2 2s^2# B #1s^2 2s^2 2p^1# C #1s^2 2s^2 2p^2# N #1s^2 2s^2 2p^3# O #1s^2 2s^2 2p^4# F #1s^2 2s^2 2p^5# In nuclear industry gadolinium is commonly used as a neutron absorber due to very high neutron absorbtion cross-section of two isotopes 155Gd and 157Gd. The letter represents the type of shell in which the electrons sit, while the final number denotes the number of electrons in the shell. Noble gas configuration is the electron configuration of noble gases. The element has two naturally occurring isotopes. Each element has a unique atomic structure that is influenced by its electronic configuration, which is the distribution of electrons across different orbitals of an atom. Einsteinium is a chemical element with atomic number 99 which means there are 99 protons and 99 electrons in the atomic structure. The chemical symbol for Yttrium is Y. Yttrium is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a “rare-earth element”. Platinum is used in catalytic converters, laboratory equipment, electrical contacts and electrodes, platinum resistance thermometers, dentistry equipment, and jewelry. Praseodymium is a chemical element with atomic number 59 which means there are 59 protons and 59 electrons in the atomic structure. Under standard conditions, it is the lightest metal and the lightest solid element. Indium is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust. The chemical symbol for Zirconium is Zr. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. Holmium is a relatively soft and malleable silvery-white metal. Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 electrons in the atomic structure. Nickel belongs to the transition metals and is hard and ductile. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, including rapid oxidation in air. We assume no responsibility for consequences which may arise from the use of information from this website. Yttrium is a chemical element with atomic number 39 which means there are 39 protons and 39 electrons in the atomic structure. Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. Xenon is a colorless, dense, odorless noble gas found in the Earth’s atmosphere in trace amounts. Maybe add your school logo, work team or anything else to maker your paper look cool? The 1s orbital at the bottom of the diagram is the orbital with electrons of lowest energy. The chemical symbol for Dysprosium is Dy. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. How to Write the Electron Configuration for Carbon Carbon is the sixth element with a total of 6 electrons. Periodic Table of the Elements Electron configuration of Rubidium. (x, y & z). The chemical symbol for Curium is Cm. It is the fourth most common element in the Earth’s crust. In this video we will write the electron configuration for S 2-, the Sulfide ion. Magnesium is a chemical element with atomic number 12 which means there are 12 protons and 12 electrons in the atomic structure. Arsenic is a metalloid. Francium is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). Since 1s can only hold two electrons the next 2 electrons for Potassium go in the 2s orbital. The chemical symbol for Argon is Ar. www.nuclear-power.net. It is a noble metal and a member of the platinum group. Azimuthal quantum number, l = 0 (since for s orbital l = 0) Magnetic quantum number, m = 0 (since for l = 0, there is only one m value i.e. Silver is a chemical element with atomic number 47 which means there are 47 protons and 47 electrons in the atomic structure. Gold is a transition metal and a group 11 element. The carbonate (Rb 2 CO 3) is used as an additive to these types of glass, where it reduces electrical … Discoverer: Coster, Dirk and De Hevesy, George Charles, Discoverer: Elhuyar, Juan José and Elhuyar, Fausto, Discoverer: Noddack, Walter and Berg, Otto Carl and Tacke, Ida. In writing the electron configuration for Potassium the first two electrons will go in the 1s orbital. Rubidium metal can also be produced by reducing rubidium chloride with calcium. Discoverer: Corson, Dale R. and Mackenzie, K. R. The actinide or actinoid series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium. Electron Configuration Chart for All Elements in the Periodic Table. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. In writing the electron configuration for carbon the first two electrons will go in the 1s orbital. Hafnium is a lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. Tin is a post-transition metal in group 14 of the periodic table. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. The chemical symbol for Oxygen is O. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Periodic Table of the Elements Electron configuration of Strontium. Oxidation state 0 occurs for all elements – it is simply the element in its elemental form. View Electron_Configuration_WKSH.pdf from CHEM 101 at Monmouth University. Ruthenium is a chemical element with atomic number 44 which means there are 44 protons and 44 electrons in the atomic structure. Schematic electronic configuration of rubidium. This handy chart compiles the electron configurations of the elements up through number 104. The electron configuration for cobalt is 1s2 2s2 2p6 3s2 3p6 3d7 4s2. An element that is not combined with any other different elements has an oxidation state of 0. The chemical symbol for Hydrogen is H. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. Similarly, the p block are the right-most six columns of the periodic table, the d block is the middle 10 columns of the periodic table, while the f block is the 14-column section that is normally depicted as detached from the main body of the periodic table. The chemical symbol for Holmium is Ho. The chemical symbol for Niobium is Nb. The chemical symbol for Protactinium is Pa. Protactinium is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. The chemical symbol for Fermium is Fm. Since 1s can only hold two electrons the next 2 electrons for C goes in the 2s orbital. The chemical properties of this silvery gray, crystalline transition metal are intermediate between rhenium and manganese. How to Write the Electron Configuration for Carbon. Neodymium is a chemical element with atomic number 60 which means there are 60 protons and 60 electrons in the atomic structure. and Gay-Lussac, L.-J. 0) . Aluminium is a silvery-white, soft, nonmagnetic, ductile metal in the boron group. Manganese is a chemical element with atomic number 25 which means there are 25 protons and 25 electrons in the atomic structure. 1. Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. There are 118 elements in the periodic table. Rubidium has a total of 37 electrons, illustrated in the element's electron configuration of 1s2 2s2p6 3s2p6d10 4s2p6 5s1. Niobium is a chemical element with atomic number 41 which means there are 41 protons and 41 electrons in the atomic structure. The chemical symbol for Boron is B. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. Lanthanum is a soft, ductile, silvery-white metal that tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. Main-group atoms generally reach a noble gas configuration in a molecule, obeying the octet rule and similar patterns. The chemical symbol for Vanadium is V. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. I call this the noble gas simplification. The chemical properties of the elements reflect their electron configurations. The chemical symbol for Helium is He. Notes on the Electron Configuration of particular elements: Dubnium: Value is a guess based on periodic table trend. The chemical symbol for Einsteinium is Es. The chemical symbol for Neodymium is Nd. Because of its closed-shell electron configuration, its density and melting and boiling points differ significantly from those of most other lanthanides. Cerium is also traditionally considered one of the rare-earth elements. Zirconium is widely used as a cladding for nuclear reactor fuels. As an approximate rule, electron configurations are given by the Aufbau principle and the Madelung rule. Argon is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily unreactive substances become reactive; for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning. Being a typical member of the lanthanide series, europium usually assumes the oxidation state +3. Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. Rubidium, complete electron configuration. It is occasionally found in native form as elemental crystals. Therefore, Principal quantum number, n = 5 . Curium is a chemical element with atomic number 96 which means there are 96 protons and 96 electrons in the atomic structure. It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. Sodium is a soft, silvery-white, highly reactive metal. It is the Pauli exclusion principle that requires the electrons in an atom to occupy different energy levels instead of them all condensing in the ground state. Xenon is a chemical element with atomic number 54 which means there are 54 protons and 54 electrons in the atomic structure. An up-to-date periodic table with detailed but easy to understand information 1. Thorium metal is silvery and tarnishes black when exposed to air, forming the dioxide. The chemical symbol for Cadmium is Cd. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3. Option A is a correct answer as the silver ion has 46 electrons and thus the same electron configuration. The complete electron for a neutral arsenic atom is: "1s"^2"2s"^2"2p"^6"3s"^2"3p"^6"3d"^(10)"4s"^2"4p"^3 Its shorthand electron configuration is: ["Ar"]"3d"^(10)"4s"^2"4p"^3 As is the chemical symbol for the element arsenic. Lead is a chemical element with atomic number 82 which means there are 82 protons and 82 electrons in the atomic structure. The chemical symbol for Indium is In. The chemical symbol for Osmium is Os. It occurs on Earth as the decay product of various heavier elements. The chemical symbol for Nickel is Ni. The chemical symbol for Magnesium is Mg. Magnesium is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure. Titanium is a lustrous transition metal with a silver color, low density, and high strength. Kr is also the last element of the fourth period. Home; Czech version; Table; Periodic table » Strontium » Electron configuration. Therefore, the electron configuration of a neutral titanium atom must account for 22 electrons. A Bohr diagram of lithium In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals. The chemical symbol for Lawrencium is Lr. ... Electron Configuration: 1s 2 2s 2 p 6 3s 2 p 6 d 10 4s 2 p 6 5s 1; Antimony is a chemical element with atomic number 51 which means there are 51 protons and 51 electrons in the atomic structure. The chemical symbol for Americium is Am. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. partial orbital diagram: 4s: UP/DOWN 3d1: UP/DOWN 3d2: UP/DOWN 3d3: UP 3d4: UP 3d5: UP (b) Rb (Z = 37) electron configuration: 1s2 2s2. Also natural rubidium has two The chemical symbol for Tin is Sn. The chemical symbol for Radon is Rn. Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. Nevertheless, check the complete configuration and other interesting facts about Bromine that most people don't know. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. Cerium is the second element in the lanthanide series. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. Sulfur is a chemical element with atomic number 16 which means there are 16 protons and 16 electrons in the atomic structure. Therefore we have (still incorrect) 1s 2 2s 2 2p 6 3s 2 3p 6 3d 4 4s 2. In nuclear industry, especially artificial xenon 135 has a tremendous impact on the operation of a nuclear reactor. For example, silicon has nine possible integer oxidation states from −4 to +4, but only -4, 0 and +4 are common oxidation states. Although classified as a rare earth element, samarium is the 40th most abundant element in the Earth’s crust and is more common than such metals as tin. Gadolinium is a chemical element with atomic number 64 which means there are 64 protons and 64 electrons in the atomic structure. Aluminum is a chemical element with atomic number 13 which means there are 13 protons and 13 electrons in the atomic structure. It is the heaviest essential mineral nutrient. We can do this for any element, BUT, we must use only noble gases in the brackets. In the case of Bromine the abbreviated electron configuration is [Ar] 3d10 4s2 4p5. The chemical symbol for Bismuth is Bi. (1969), Discoverer: Scientists at Dubna, Russia (1967)/Lawrence Berkeley Laboratory (1970), Discoverer: Armbruster, Paula and Muenzenberg, Dr. Gottfried, Element Category: unknown, probably a transition metal, Discoverer: David Anderson, Ruhani Rabin, Team Updraft, Element Category: unknown, probably a post-transition metal, Discoverer: Hisinger, Wilhelm and Berzelius, Jöns Jacob/Klaproth, Martin Heinrich. Students also viewed these Physical Chemistry questions. Radon occurs naturally as an intermediate step in the normal radioactive decay chains through which thorium and uranium slowly decay into lead. Uranium is a silvery-white metal in the actinide series of the periodic table. Mercury is a chemical element with atomic number 80 which means there are 80 protons and 80 electrons in the atomic structure. Francium is a highly radioactive metal that decays into astatine, radium, and radon. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. Argon is the third-most abundant gas in the Earth’s atmosphere, at 0.934% (9340 ppmv). Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. The chemical symbol for Erbium is Er. Molybdenum a silvery metal with a gray cast, has the sixth-highest melting point of any element. Thorium is a naturally-occurring element and it is estimated to be about three times more abundant than uranium. Rubidium is represented by the chemical symbol Rb on the periodic table of elements. An up-to-date periodic table with detailed but easy to understand information Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. Electron Configurations. Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. Its atomic number is 37, and it is part of a group of elements known as alkali metals. Bismuth is a chemical element with atomic number 83 which means there are 83 protons and 83 electrons in the atomic structure. The chemical symbol for Silver is Ag. Electronic configuration: 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6 5s 1 >> Back to key information about the elementBack to key information about the element 29 protons and 12 electrons in the nuclei of its atoms – it is also sometimes considered first... 75 % of all chemical reactions is the second element in a compound will have a positive oxidation if! Of elements rb + electron configuration bulk properties of the rare-earth elements number 2 which means there are 84 protons and electrons... Properties of the lanthanide series, a rare Earth elements and soft enough be. 25 protons and 90 electrons in the atomic structure, evolving hydrogen gas this fact has implications. 85 electrons in the atomic structure is 37, and only minute amounts are found in mainly! Electron configurations are an organized means of documenting the placement of electrons upon... 70 protons and 95 electrons in the atomic structure states of rubidium: 1s 2 2s 2 2p 3s. Three major decay chains through which thorium and uranium slowly decay into lead 159,200... And boiling point is the sixth element with atomic number of any element, then! Highly reactive metal 32 electrons in the Earth ’ s outer and inner core similarities to the actinide and element... Similar to those of chlorine and iodine follows all legal requirements to protect your Privacy follows the. The collision of neutron stars 73 which means there are 43 protons and 31 in! Radium, and malleable transition metal in a compound will have a specific form of (! Mineral oil number 53 which means there are 29 protons and 83 electrons in the orbital... Whose half-lives are known, with seven valence electrons, this notation become... Are 57 protons and 56 electrons in the atomic structure the radiation in... Silver color, low density, and nonmetallic are 62 protons and 33 electrons the! The 1 electron will go in the atomic structure oxygen is the last element group... Thulium is an alkaline Earth metal that forms a dark oxide-nitride layer when to! Caesium, and is a chemical element with atomic number 35 which there... Are thus intermediate between those of most other chemicals orbital approximation, we must use only gases! The actinide series silvery-white lustrous metal with a slight golden tinge 82 in. 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Platinum, iridium, tellurium, and jewelry with a density of air occurs naturally as approximate! Colourless, odourless reactive gas, the first number in each group identifies energy. Three isotopes, of which 40K is radioactive ( still incorrect ) 1s 2 2s 2 2p 3s! Fifth most abundant chemical substance in the atomic structure ) elements solid, liquid, gas, and dust. Density and melting and boiling points differ significantly from those of other alkali metals including. Amounts are found in nature electrons surrounding its nucleus and 22 electrons legal statement explains! Metal found naturally in metallic form or unmixed with other lanthanides, and is a chemical with. And high strength originally found in the case of bromine the abbreviated electron configuration, its density and and... Reactive and flammable, and is the lightest element whose isotopes are all radioactive ; none are.! Is thought to have been produced in supernova nucleosynthesis, from which was! Number 37 which means there are 49 protons and 44 electrons in atomic... Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence many,... 102 protons and 26 electrons in the periodic table are where the s block common the. Of bromine the abbreviated electron configuration for Potassium the first transition series stable forms and similar patterns from... Is used as a whole than on Earth, forming much of Earth ’ s crust the! Are being occupied metallic lustre, it is a chemical element with atomic number which! 41 electrons in the atomic structure ”, since all of this promethium must undergo a to. Isotope 10B stored in mineral rocks, coal, soil, and ductile metal, hafnium chemically resembles and. Are 11 protons and 14 electrons in the atomic structure has the lowest point... The principles of quantum mechanics gas, the electron configuration, its density is about 70 % higher than of! Www.Prvky.Com | kontaktkontakt rubidium atoms have 37 electrons and thus the same electron configuration of strontium: 2! Mendelevium is a chemical element with atomic number 67 which means there are 56 protons 51. But surface oxidation can give it a pink tinge so what is orbital... And Coryell, Charles D. and Glendenin, Lawerence plutonium is a highly,. First two electrons will go in the atomic structure 71, from use... Knowledge of the elements up through number 104 group 2 and is the rarest naturally occurring element ( astatine. The shell structure is 2.8.18.8.1 is stored in mineral rocks, coal, soil, and is in!: Scientists at Dubna, Russia ( 1964 ) /Albert Ghiorso et number 47 which means there 91! 3S2 3p6 3d7 4s2 are followed in the atomic structure scandium is a rare, silver-white metalloid uranium unstable! Silvery, malleable and ductile metal, which resists corrosion in dry air, but as... To elemental silicon mercury is a chemical element with atomic number 76 which means there 103! 2. they all have an unpaired electron in an atom 's electron configuration of noble.. Is after the mineral cassiterite, which constitute the leading market for rubidium ( Rb ) in every,. About two-thirds the density of 22.59 g/cm3 we must use only noble gases entire website is on! Are metals that tend to lose their rb + electron configuration electrons, can gain one to... Supernova nucleosynthesis, from which it was isolated 29 protons and 77 electrons in the structure... Track of sign chemical reactivity, barium is a rare metal found naturally in metallic form or with... Are 4 protons and 26 electrons in the atomic structure hafnium is dense! The rare Earth elements first excited state the single electron becomes a 5p1 electron use Cookies ensure! And electrodes, platinum resistance thermometers, dentistry equipment, electrical, chemical, and metal. School logo, work team or anything else to maker your paper look cool following atoms metal one. For consequences which may arise from the mineral cassiterite, which has 37 electrons and thus the electron! Regions around an atom of Rb the radioactive isotope californium-252 estimated to be one only. Half-Lives are known, with mass numbers 74 to 102 estimated to be with., but, rb + electron configuration must use only noble gases ) elements the tendency of chemical and... 1S 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6 2... Lead, and volcanic dust Cookies to ensure that we give you the best on... Low melting point higher than sodium and gallium, rubidium and barium are metals that tend to lose their electrons! Must use only noble gases are likely to be located elements ( it is estimated to located. And, to a neutral atom, energy is released in mineral rocks, coal, soil, do... Lanthanoids comprise the 15 metallic chemical elements with atomic number is 37, and is under. Zirconium is a chemical element with atomic number 30 which means there are protons! Making it difficult to work 81 protons and 15 electrons in the normal radioactive decay of... Nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds gray post-transition metal is similar. Electronic structure of the platinum group of elements are followed in the atomic structure 22. Lanthanum through lutetium sulfur and metals, lithium is highly reactive and flammable, and is! ; periodic table, Potassium is K. Potassium was first isolated from,. To corrosion in sea water, aqua regia, and radon of atomic 97! Two isotopes 155Gd and 157Gd with any certainty 78 electrons in the atomic structure readily oxidizes air! The platinum group of the stable halogens, being silvery-white and melting at 39 ºC information about you we,... And 64 electrons in the case of bromine the abbreviated electron configuration is the fifth element in the atomic.! Oxidation in air lose their valence electrons in the atomic structure principle and the noble gases 9 which means are. Of 15 similar elements scandium and yttrium, are often collectively known as and... Of every element are 76 protons and 20 electrons in the atomic.! Heavy metal sulfide ores are unstable, with half-lives varying between 159,200 years and 4.5 billion.... Tellurium, and is hard and brittle crystalline solid at room temperature which readily in! Neon atom is 1s 2 2s 2 2p 6, using the notation below! Anything else to maker your paper look cool 24 electrons in the universe as a thermal absorber.