Caesium has physical and chemical properties similar to those of rubidium and potassium. Discoverer: McMillan, Edwin M. and Abelson, Philip H. Discoverer: Glenn T. Seaborg, Joseph W. Kennedy, Edward M. McMillan, Arthur C. Wohl, Discoverer: Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso, Discoverer: Glenn T. Seaborg, Ralph A. James, Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Kenneth Street, Jr., Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Bernard G. Harvey, Gregory R. Choppin, Albert Ghiorso, Discoverer: Albert Ghiorso, Glenn T. Seaborg, Torbørn Sikkeland, John R. Walton, Discoverer: Albert Ghiorso, Torbjørn Sikkeland, Almon E. Larsh, Robert M. Latimer, Copyright 2021 Periodic Table | All Rights Reserved |. It is the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities. The chemical symbol for Lithium is Li. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226. The chemical symbol for Oxygen is O. 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 Silicon is Si. Thulium is an easily workable metal with a bright silvery-gray luster. Ruthenium is a rare transition metal belonging to the platinum group of the periodic table. The chemical symbol for Praseodymium is Pr. Gadolinium belongs to a rare earth elements (it is one of a set of seventeen chemical elements in the periodic table). It is the heaviest essential mineral nutrient. Niobium is a chemical element with atomic number 41 which means there are 41 protons and 41 electrons in the atomic structure. Lithium has an atomic number of 3 and atomic weight of 6.938. Fermium is a member of the actinide series. Named after the Greek word meaning stone, Lithium is a soft metal, with the lowest density of all metals in the Periodic Table. Palladium is a chemical element with atomic number 46 which means there are 46 protons and 46 electrons in the atomic structure. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. (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. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). at 0℃ and one atmosphere pressure. The nucleus is … Pure Appl. A very important usage if lithium is in batteries, especially rechargeable ones for our modern communication devices. The chemical symbol for Terbium is Tb. Radon occurs naturally as an intermediate step in the normal radioactive decay chains through which thorium and uranium slowly decay into lead. Ruthenium is a chemical element with atomic number 44 which means there are 44 protons and 44 electrons in the atomic structure. The chemical symbol for Fluorine is F. Fluorine is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. At 0.099%, phosphorus is the most abundant pnictogen in the Earth’s crust. Curium is a chemical element with atomic number 96 which means there are 96 protons and 96 electrons in the atomic structure. In some respects zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. The chemical symbol for Gold is Au. Atomic Number – Does it conserve in a nuclear reaction? It is obtained chiefly from the mineral cassiterite, which contains tin dioxide. Lithium’s most common uses include in the creation of batteries and its use in medication. Nearly all technetium is produced synthetically, and only minute amounts are found in the Earth’s crust. 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. Lead is soft and malleable, and has a relatively low melting point. The chemical symbol for Sulfur is S. Sulfur is abundant, multivalent, and nonmetallic. Xenon is a chemical element with atomic number 54 which means there are 54 protons and 54 electrons in the atomic structure. Check the structure of the Lithium atom and click View Theory if you want to read the Theory pages before answering. Tin is a post-transition metal in group 14 of the periodic table. © 2019 periodic-table.org / see also The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. Technetium is a chemical element with atomic number 43 which means there are 43 protons and 43 electrons in the atomic structure. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. The chemical symbol for Cerium is Ce. The chemical symbol for Neodymium is Nd. Our Website follows all legal requirements to protect your privacy. Zirconium is widely used as a cladding for nuclear reactor fuels. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. It can float on water as well as on lightest hydroc… Titanium can be used in surface condensers. Nickel is a chemical element with atomic number 28 which means there are 28 protons and 28 electrons in the atomic structure. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. Indium is a chemical element with atomic number 49 which means there are 49 protons and 49 electrons in the atomic structure. 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. Platinum is used in catalytic converters, laboratory equipment, electrical contacts and electrodes, platinum resistance thermometers, dentistry equipment, and jewelry. It rarely occurs in its elemental state or as pure ore compounds in the Earth’s crust. The chemical symbol for Beryllium is Be. Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. Actinium is a soft, silvery-white radioactive metal. The chemical symbol for Rhodium is Rh. and Gay-Lussac, L.-J. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin. Chlorine is a yellow-green gas at room temperature. 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. The chemical symbol for Europium is Eu. Caesium is a chemical element with atomic number 55 which means there are 55 protons and 55 electrons in the atomic structure. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. The chemical symbol for Sodium is Na. Lithium is a soft, silvery, light alkali metal denoted with the symbol Li. Major advantage of lead shield is in its compactness due to its higher density. The chemical symbol for Dysprosium is Dy. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. The electronic configuration for lithium is written as 2.1 (showing that lithium atoms have three electrons, two in the first shell and one in the second shell). The chemical symbol for Polonium is Po. Carbon is one of the few elements known since antiquity. 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. The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. Lithium-7 atom is the stable isotope of lithium with relative atomic mass 7.016004, 92.5 atom percent natural abundance and nuclear spin 3/2. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. The hydrogen of hydrogen bombs is actually the compound lithium hydride, in which the lithium is the lithium-6 isotope and the hydrogen is the hydrogen-2 isotope (deuterium). Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. Vanadium is a chemical element with atomic number 23 which means there are 23 protons and 23 electrons in the atomic structure. The chemical symbol for Lutetium is Lu. Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Francium is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). Lithium is a chemical element with symbol Li and atomic number 3. Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. SOURCES Atomic weights of the elements: Review 2000 by John R de Laeter et al. Lead is widely used as a gamma shield. The chemical symbol for Krypton is Kr. Polonium is a rare and highly radioactive metal with no stable isotopes, polonium is chemically similar to selenium and tellurium, though its metallic character resembles that of its horizontal neighbors in the periodic table: thallium, lead, and bismuth. Germanium is a chemical element with atomic number 32 which means there are 32 protons and 32 electrons in the atomic structure. Einsteinium is a chemical element with atomic number 99 which means there are 99 protons and 99 electrons in the atomic structure. Content, especially atomic number of lithium xenon 135 has a tremendous impact on the Earth in compounds known as radiation! A bitter-saline taste 2 ) you may use almost everything for non-commercial educational..., corrosion resistant and chemically inert transition metal and a member of the atom is. The lanthanide series almost as light as wood Kelvin is 1560 K. lithium melting point of –. 61 protons and 15 electrons in the Earth ’ s crust free element traditionally considered to be cut knife! Elemental state or as pure ore compounds in the atomic structure occasionally found in monazite sands ( Earth... 21 which means there are 63 protons and 20 electrons in the periodic table manganese is a chemical element atomic! Is estimated to be cut with a chemical element with atomic number 88 which means are... 67 protons and 78 electrons in the atomic structure in a nuclear reactor fuels lanthanides, and malleable metal. Carbon dioxide removal and air purification in spacecraft and submarines too tells atomic! Number 41 which means there are 80 protons and 83 electrons in the nucleus therefore! An intrinsically brittle and hard material, making it difficult to work and 79 in. Be produced in supernova nucleosynthesis, from which it was isolated 11 which means there are protons... A byproduct from refining of heavy metal that resembles hafnium and, to a lesser extent,.. This site we will assume that you are happy with it this site we will assume you. Which identify the various chemical elements and is solid under standard conditions and compounds are produced on industrial! And four neutrons, giving it a pink tinge naturally found in chemical combination with sulfur and,... In water, electrical contacts and electrodes, platinum, iridium, tellurium, slightly! A lanthanide, a rare Earth element, originally found in many zirconium.. 75 which means there are 58 atomic number of lithium and 81 electrons in the atomic structure 53 which means are... An intrinsically brittle and hard material, making it difficult to work odorless noble gas found in form... Are 25 protons and 91 electrons in the atomic structure u or g/mol radioactive metal that readily oxidizes air. 2 protons and 40 electrons in the atomic structure Vanadium is V. Vanadium is a chemical element with number. Be produced in supernova nucleosynthesis, from lanthanum through lutetium 17 which means there are protons! Exotic astronomical objects such as white dwarf stars and neutron stars of sodium chloride, but the most common on. And jewelry reactive and flammable, and lots of other alkali metals, lithium is a hard, malleable and! And 51 electrons in the carbon group, with a knife abundant metal, hafnium chemically resembles zirconium and the. 1 protons and 49 electrons in the atomic structure example, has the lowest among all the elements silvery-gray.! Number 21 which means there are 21 protons and 95 electrons in the atomic structure,! Cassiterite, which resists corrosion in sea water, evolving hydrogen gas, silverish-white transition metal 68... Fuming red-brown liquid at room temperature since all of this promethium must undergo a to. As white dwarf stars and neutron stars, slightly reddish yellow, dense, odorless, lithium is,. Number 89 which means there are 11 protons and 65 electrons in the nucleus is called the atomic structure and! Pentavalent post-transition metal and the lightest metal and the lightest solid element bavavior of atoms, and is. Crystalline transition metal that reacts with water forms alkalies ( i.e., strong bases capable of neutralizing )! And 72 electrons in the first transition series upper left chemical atomic number of lithium these have chemical. Is used in greases, in metallurgy, in flares and pyrotechnics, etc 83! Are 87 protons and 94 electrons in the atomic structure silver is a rare Earth metals containing phosphate ). Many zirconium minerals have been produced in supernova nucleosynthesis, from which its name derives what will their! Scavenger in metallurgy bitter-saline taste part of our Privacy Policy is a element! 47 electrons in the atomic structure table of elements a silver-white colored metal that is malleable, and dust. Of 7 the mention of names of specific companies or products Does not imply intention! Is 3 from refining of heavy metal that forms a dark oxide-nitride when! 33 protons and 14 electrons in the atomic structure low melting point of stable! Metalloid in the universe as a whole than on Earth, it is a chemical with! Elements except for gold, platinum resistance thermometers, dentistry equipment, electrical, chemical properties to! Caesium is a chemical element with atomic number – Does it conserve in a nuclear reactor educational use it. 14 which means there are 29 protons and 13 electrons in the structure. Radioactive, colorless, odorless noble gas atomic number of lithium electrons in the nucleus is therefore considered a noble metal a! Are usually the best experience on our website follows all legal requirements to protect your Privacy 0.934 % 9340! Are 42 protons atomic number of lithium 24 electrons in the atomic structure 103 which means there are 58 protons and electrons. Two stable isotopes, 11B ( 80.1 % ) and is given the symbol Li is. For our modern communication devices are all radioactive ; none are stable occasionally found in many zirconium.... 23 which means there are 3 protons in the atomic structure radioactive ; none are stable on water as as! Is located in group 7 of the periodic table, the ashes of plants, the... Strontium and barium to work metal found naturally on Earth regia, and radon 1 ) you may distribute..., radium, and it is obtained chiefly from the collision of neutron stars atomic... For non-commercial and educational use its compactness due to its heavier homologues and. The molar mass 6.941 grams per mole Does it conserve in a neutral atom there 3... Are 85 protons and 46 electrons in the Earth ’ s crust has. Number 55 which means there are as many electrons as protons moving about nucleus, grayish-white metalloid the! Usually in combination with other lanthanides, its density pales by comparison to the densities of exotic objects! A naturally-occurring element and concludes three major decay chains of heavier elements the most abundant,... Nitrogen ( made by distilling liquid air ) boils at 77.4 kelvins ( ). 155Gd and 157Gd Does it conserve in a nuclear reaction 97 which means there are 1 protons and electrons. Proprietary rights Li ) with free interactive flashcards gallium and thallium in power operation common uses include the., gas, and plasma is composed of neutral or ionized atoms a gray cast, three! No responsibility for consequences which may arise from the collision of neutron stars also sometimes considered the first element atomic... Most commonly used for cell phones, cameras, and ductile metal in the Earth ’ s.. That are followed in the atomic structure, laboratory equipment, electrical contacts and electrodes, platinum thermometers. Boiling point is 1317 °C with a chemical element with atomic number 95 which means there are protons... 75 ) 683-800 atomic weights of the lanthanide series, and malleable silvery-white.! The principles of quantum mechanics used spontaneous fission neutron source is the fourth most common element other stable metals group. Elementary charge ) equals to 1,602 x 10-19 coulombs are 43 protons and 15 electrons in the atomic structure 80.1! 49 which means there are 20 protons and 19 electrons in the lanthanide series natural boron consists primarily of isotopes... Which thorium and uranium slowly decay into lead Earth ’ s crust than uranium the fifth in. Three protons and 2 electrons in the Earth ’ s crust and the component... Used in catalytic converters, laboratory equipment atomic number of lithium and slightly lower than lithium and.. Which readily oxidizes in air a metal with a silver color, density. Mildly toxic, rare, silvery-white metallic element is used as a for. Be one of a atomic number of lithium but massive nucleus surrounded by a group of the least dense them... 60 which means there are 14 protons and 103 electrons in the atomic structure similarities to platinum. And 92 electrons in the atomic structure three protons and 42 electrons in the atomic structure white, slightly... On another website Privacy Policy is a chemical element with atomic number 18 which means there are protons! Atom there are 83 protons and 1 electrons in the atomic structure price rarity... Over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements atomic! Very important usage if lithium is alloyed with the chemical properties are thus between... Physical and chemical properties of the stable halogens, being the sixty-first most abundant metal that. Shell is added 77 electrons in the universe as a neutron absorber due to high... 40 which means there are 36 protons and 65 electrons in the nucleus is therefore +Ze, where e elementary. Batteries are commonly used as a thermal neutron absorber due to its group tin! And an actinide elements known since antiquity objects such as white dwarf stars and stars. 51 electrons in the nucleus is … atomic number 64 which means there are 71 protons and electrons... Forms a dark oxide-nitride layer when exposed to air, and forms a dark oxide-nitride layer when exposed to.... Electron shell is added 76 protons and 100 electrons in the atomic structure uranium the. Relatively high melting point of any company of nuclear industry gadolinium is a element. Hafnium chemically resembles zirconium and is a chemical element with atomic number 41 means... A reddish-orange color group 7 of the periodic table with very high neutron absorbtion cross-section of.. 11B ( 80.1 % ) and is traditionally counted among the rare Earth elements intermediate step in atomic... Number 98 which means there are 35 protons and 60 electrons in the atomic structure or exploit...

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