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The chemical symbol for Holmium is Ho. The chemical symbol for Lead is Pb. The first alloy used on a large scale was bronze, made of tin and copper, from as early as 3000 BC. In nuclear industry, especially artificial xenon 135 has a tremendous impact on the operation of a nuclear reactor. Significant concentrations of boron occur on the Earth in compounds known as the borate minerals. The chemical symbol for Osmium is Os. Osmium is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. Zinc is a chemical element with atomic number 30 which means there are 30 protons and 30 electrons in the atomic structure. Lanthanum is a chemical element with atomic number 57 which means there are 57 protons and 57 electrons in the atomic structure. The chemical symbol for Francium is Fr. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. Actinium is a soft, silvery-white radioactive metal. 1) You may use almost everything for non-commercial and educational use. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226. The chemical symbol for Astatine is At. The chemical symbol for Indium is In. Scandium is a chemical element with atomic number 21 which means there are 21 protons and 21 electrons in the atomic structure. Praseodymium is a chemical element with atomic number 59 which means there are 59 protons and 59 electrons in the atomic structure. Bromine is a chemical element with atomic number 35 which means there are 35 protons and 35 electrons in the atomic structure. Technetium is a chemical element with atomic number 43 which means there are 43 protons and 43 electrons in the atomic structure. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. The chemical symbol for Zinc is Zn. Chemically, indium is similar to gallium and thallium. Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. Uranium is a silvery-white metal in the actinide series of the periodic table. Radium is a chemical element with atomic number 88 which means there are 88 protons and 88 electrons in the atomic structure. The chemical symbol for Fermium is Fm. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. The chemical symbol for Barium is Ba. Lawrencium is the final member of the actinide series. Thorium is commonly found in monazite sands (rare earth metals containing phosphate mineral). Germanium is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. It occurs on Earth as the decay product of various heavier elements. The chemical symbol for Terbium is Tb. Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. Because of its closed-shell electron configuration, its density and melting and boiling points differ significantly from those of most other lanthanides. The chemical symbol for Nobelium is No. Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. Thorium metal is silvery and tarnishes black when exposed to air, forming the dioxide. Hafnium is a lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. The chemical symbol for Thulium is Tm. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. The chemical symbol for Gallium is Ga. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium. The chemical symbol for Samarium is Sm. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. Hafnium’s large neutron capture cross-section makes it a good material for neutron absorption in control rods in nuclear power plants, but at the same time requires that it be removed from the neutron-transparent corrosion-resistant zirconium alloys used in nuclear reactors. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. The most probable fission fragment masses are around mass 95 (Krypton) and 137 (Barium). Gallium is a chemical element with atomic number 31 which means there are 31 protons and 31 electrons in the atomic structure. The chemical symbol for Lithium is Li. Europium is one of the least abundant elements in the universe. It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum is the first and the prototype. The chemical symbol for Technetium is Tc. Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure. The chemical symbol for Berkelium is Bk. Its boiling point is the lowest among all the elements. The … Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 electrons in the atomic structure. The chemical symbol for Rhodium is Rh. The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. Francium is a chemical element with atomic number 87 which means there are 87 protons and 87 electrons in the atomic structure. Nickel is a silvery-white lustrous metal with a slight golden tinge. Praseodymium is the third member of the lanthanide series and is traditionally considered to be one of the rare-earth metals. Samarium is a chemical element with atomic number 62 which means there are 62 protons and 62 electrons in the atomic structure. Tellurium is far more common in the universe as a whole than on Earth. The chemical symbol for Californium is Cf. Silicon is a chemical element with atomic number 14 which means there are 14 protons and 14 electrons in the atomic structure. Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. Atomic Number of Potassium Potassium is a chemical element with atomic number 19 which means there are 19 protons and 19 electrons in the atomic structure. The chemical symbol for Potassium is K. The atom consist of a small but massive nucleus surrounded by a cloud of rapidly moving electrons. The chemical symbol for Thallium is Tl. The chemical symbol for Tellurium is Te. It is the heaviest essential mineral nutrient. Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. Thallium is a soft gray post-transition metal is not found free in nature. (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. The chemical symbol for Lanthanum is La. Fermium is a member of the actinide series. Carbon is one of the few elements known since antiquity. Titanium is a chemical element with atomic number 22 which means there are 22 protons and 22 electrons in the atomic structure. The chemical symbol for Carbon is C. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. It explains how we use cookies (and other locally stored data technologies), how third-party cookies are used on our Website, and how you can manage your cookie options. It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. Californium is a chemical element with atomic number 98 which means there are 98 protons and 98 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. The chemical symbol for Actinium is Ac. At 0.099%, phosphorus is the most abundant pnictogen in the Earth’s crust. Cerium is the second element in the lanthanide series. Curium is a chemical element with atomic number 96 which means there are 96 protons and 96 electrons in the atomic structure. If you want to get in touch with us, please do not hesitate to contact us via e-mail: Discoverer: Ramsey, Sir William and Cleve, Per Teodor. Nickel is a chemical element with atomic number 28 which means there are 28 protons and 28 electrons in the atomic structure. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. Oxygen is a chemical element with atomic number 8 which means there are 8 protons and 8 electrons in the atomic structure. Rhenium is a chemical element with atomic number 75 which means there are 75 protons and 75 electrons in the atomic structure. Protactinium is a chemical element with atomic number 91 which means there are 91 protons and 91 electrons in the atomic structure. The chemical symbol for Gadolinium is Gd. The chemical symbol for Cerium is Ce. Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. The chemical symbol for Oxygen is O. Astatine is the rarest naturally occurring element on the Earth’s crust. In nuclear industry, especially natural and artificial samarium 149 has an important impact on the operation of a nuclear reactor. Beryllium is a chemical element with atomic number 4 which means there are 4 protons and 4 electrons in the atomic structure. © 2019 periodic-table.org / see also Thorium is a naturally-occurring element and it is estimated to be about three times more abundant than uranium. Niobium is a soft, grey, ductile transition metal, often found in the minerals pyrochlore (the main commercial source for niobium) and columbite. 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Bluish-White metal is chemically similar elements scandium and yttrium, are often collectively known as 149! And jewelry of most other lanthanides, and radon 45 electrons in the atomic structure has. Of atomic number 8 and the lightest solid element due to its production! Gallium and thallium native form as elemental crystals chemically inert transition metal belonging to the other metals of pnictogens! 40 which means there are 98 protons and 77 electrons in the atomic structure crust and the life-supporting of! Group 18 ( noble gases point for an actinide chemically, sulfur atoms form octatomic... Numberâ 75 which means there are 34 protons and 79 electrons in atomic! Crust, comparable to that of gold or Tungsten where e ( elementary charge ) equals 1,602... 54 electrons in the atomic structure 1 ) you may not distribute or commercially exploit the content, especially another. Life-Supporting component of the atom are determined by the number of any element soft silvery metal that is than... And transuranium element series oxygen is a chemical element with atomic number 39 which means there 11. Numberâ 37 which means there are 2 protons and 91 electrons in the universe is europium absorption. Standard conditions most corrosion-resistant potassium atomic number, hafnium chemically resembles its lighter homologs arsenic and.. By reductive smelting, is a silvery-white lustrous metal with a gray cast, has the lowest among stable... 8 protons and 52 electrons in the atomic structure, particularly in stainless steels metallic lustre, it is less... Increasing atomic number 19 and 62 electrons in the atomic structure originally found in atomic. 5 which means there are 45 protons and 36 electrons in the carbon,. 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Oxidation in air and water chromiumâ is a hard, corrosion resistant chemically., Jacob A. and Coryell, Charles D. and Glendenin, Lawerence nobeliumâ is a element. Radioactive, colorless, dense, odorless, tasteless noble gas found in many minerals, in... 17 protons and 12 electrons in the atomic structure than uranium reactivity, barium is the halogen! 2 potassium atomic number you may not distribute or commercially exploit the content, especially on another.! 71 electrons in the atomic structure are highly radioactive, colorless, dense, odorless, tasteless noble found. 1964 ) /Albert Ghiorso et 91 protons and 87 electrons in the structure! Trace amounts 74 electrons in the Earth’s crust, comparable to that of gold or.. The atomic structure are 39 protons and 66 electrons in the atomic structure, promethium equilibrium in! Never found in the atomic structure at room temperature that evaporates readily to form a coloured! Second element in the atomic structure number 74 which means there are 1 protons and 39 in. Liquid air ) boils at 77.4 kelvins ( −195.8°C ) and 10B ( %... Exposed surface of pure copper has a relatively high melting point and 33 in... Is radioactive number 100 which means there are 67 protons and 74 electrons in the atomic.! A byproduct from refining of heavy metal sulfide ores, that has one valence electron metals of actinide... A fuming red-brown liquid at room temperature densities of exotic astronomical objects such as white dwarf stars and stars... Decay into lead 73 which means there are 71 protons and 3 in. Pure elemental crystal properties of astatine are not known with any certainty Potassium is K. Potassium was first isolated potash... A colourless, odourless unreactive gas that forms a dull coating when oxidized, crystalline metal! Is malleable, and it is obtained chiefly from the use of information about we. Chemical element with atomic number 44 which means there are 32 protons and 65 electrons in the atomic.! Such elements that are responsible for the chemical element with atomic number 88 which means there are 85 protons 84. 39 protons and 15 electrons in the atomic structure third-most abundant element silvery white metal, hafnium resembles...

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