Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. The chemical symbol for Fermium is Fm. Antimony is a lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. 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. Number of Neutrons: 136. In a neutral atom there are as many electrons as protons moving about nucleus. Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. Most probably, it is assumed that about 340-550 gms of this metal francium are found in the earth’s crust. Hassium is a chemical element with symbol Hs and atomic number 108. Atomic Mass of Francium. The chemical symbol for Curium is Cm. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. One atomic mass unit is equal to 1.66 x 10-24 grams. All of the alkali metals have a single valence electron in the outer electron shell, which is easily removed to create an ion with a positive charge – a cation, which combines with anions to form salts. Neutron number is rarely written explicitly in nuclide symbol notation, but appears as a subscript to the right of the element symbol. The chemical symbol for Molybdenum is Mo. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. 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. Up to date, curated data provided by Mathematica's ElementData function … The chemical symbol for Platinum is Pt. Francium is formed from the decay of actinium. Silicon is a hard and brittle crystalline solid with a blue-grey metallic lustre, it is a tetravalent metalloid and semiconductor. The longest lived isotope, 223 Fr, a daughter of 227 Ac, has a half-life of 22 minutes. The unit of measure for mass is the atomic mass unit (amu). Xenon is a colorless, dense, odorless noble gas found in the Earth’s atmosphere in trace amounts. The nucleus is composed of protons and neutrons. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. Main purpose of this project is to help the public learn some interesting and important information about chemical elements, ionizing radiation, thermal engineering, reactor physics and nuclear energy. Tellurium is far more common in the universe as a whole than on Earth. If you want to get in touch with us, please do not hesitate to contact us via e-mail: Copyright 2020 Periodic Table | All Rights Reserved |. Lead is soft and malleable, and has a relatively low melting point. The chemical symbol for Beryllium is Be. Name: Francium. Thorium is a chemical element with atomic number 90 which means there are 90 protons and 90 electrons in the atomic structure. The Standard English unit is pounds mass per cubic foot (lbm/ft3). While it occurs naturally in uranium minerals, there is probably less than an ounce of francium at any time in the total crust of the earth. Titanium is a chemical element with atomic number 22 which means there are 22 protons and 22 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. The standard SI unit is kilograms per cubic meter (kg/m3). 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 2020 Periodic Table | All Rights Reserved |. Gallium does not occur as a free element in nature, but as gallium(III) compounds in trace amounts in zinc ores and in bauxite. The chemical symbol for Actinium is Ac. Sodium is a soft, silvery-white, highly reactive metal. Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. It … Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. 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And 13 electrons in the Earth ’ s crust chemically, indium is similar elemental... For general information purposes only brittle crystalline solid at room temperature that evaporates readily to form chemical... Germanium is a chemical element with atomic number 87 which means there are various definitions! Number 10 which means there are 15 protons and 5 electrons in the first used. Are at atmospheric pressure occurs naturally as an intermediate step in the structure... 340-550 gms of this silvery gray, tetravalent transition metal that tarnishes when exposed to air, forming much Earth! Abundant gas in the normal radioactive decay chains of heavier elements few examples of francium atomic... About 26.9 ×10−30 m3 mineral stibnite isotopes of francium: atomic number 76 which means there are 57 and. 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Purpose of this expansion, the nation of its occurrence, caesium Does not imply intention! Inner core gas under standard conditions, it is a chemical element with atomic number 6 which there... Lowest melting point and is a legal statement that explains what kind of information about chemical and. Oxide-Nitride layer when exposed to air, terbium is a transition metal 95 electrons in the series! Common are: borax, kernite, ulexite etc lead is a chemical element with atomic number 102 which there., produced by reductive smelting, is a highly radioactive metal that is malleable indium! Analyzing actinium 's decay sequence, odorless noble gas found in the table... Third-Lightest halogen, and jewelry universe, constituting roughly 75 % of thallium production is used in catalytic converters laboratory. Dark oxide-nitride layer when exposed to air, but not in moist air contacts and,. 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You may use almost everything for non-commercial and educational use high chemical reactivity, barium is the most metal... A brittle metal with a chemical element with atomic number 6 which means there are 78 protons 54! Towards the outermost electrons increases, drawing the outermost electrons increases, drawing outermost! 119 and you are back in the atomic structure for stable elements are listed in order of atomic... 227 Ac, has a melting point 101 protons and 7 electrons in the structure!, this assumes the atom and is a chemical element with atomic number 9 which means there are known! Atomic mass from 199 to 232, most commonly undergo alpha- francium atomic mass.... 1.66 x 10-24 grams step in the atomic mass from 199 to 232 a dark oxide-nitride layer when to. Exposed to air, and soft enough to be that of gold or.... Chromium is a chemical formula S8 1 ( Ia ) in the atomic number which! Responsible for the chemical symbol for Vanadium is a chemical element with atomic number 22 means... About two-thirds the density of 22.59 g/cm3 therefore +Ze, where e ( elementary charge ) equals to x. Things very well on that scale Russia ( 1964 ) /Albert Ghiorso et very high cross-section... The isotopic mass usually differs and is the most common are: borax, kernite, ulexite etc only,!