Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. The chemical symbol for Neon is Ne. Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. The information contained in this website is for general information purposes only. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. For 12C the atomic mass is exactly 12u, since the atomic mass unit is defined from it. The chemical symbol for Cobalt is Co. Cobalt is found in the Earth’s crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. Density is defined as the mass per unit volume. Silicon is a chemical element with atomic number 14 which means there are 14 protons and 14 electrons in the atomic structure. The chemical symbol for Terbium is Tb. Indium is a chemical element with atomic number 49 which means there are 49 protons and 49 electrons in the atomic structure. Californium is a chemical element with atomic number 98 which means there are 98 protons and 98 electrons in the atomic structure. Calcium is a chemical element with atomic number 20 which means there are 20 protons and 20 electrons in the atomic structure. One unified atomic mass unit is approximately the mass of one nucleon (either a single proton or neutron) and is numerically equivalent to 1 g/mol. Indium is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust. Americium is a transuranic member of the actinide series, in the periodic table located under the lanthanide element europium, and thus by analogy was named after the Americas. and Gay-Lussac, L.-J. Hafnium is a chemical element with atomic number 72 which means there are 72 protons and 72 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. Platinum is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. The chemical symbol for Caesium is Cs. We can determine the neutron number of certain isotope. Mendelevium is a chemical element with atomic number 101 which means there are 101 protons and 101 electrons in the atomic structure. Lead is a heavy metal that is denser than most common materials. Elevated 20Ne abundances are found in diamonds, further suggesting a solar-neon reservoir in the Earth. made by nuclear reactions of other nuclides with neutrons or other particles in the environment) and their variations in natural abundance are well understood. Einsteinium is the seventh transuranic element, and an actinide. The name neon is derived from the Greek word, νέον, neuter singular form of νέος (neos), meaning new. It is the fourth most common element in the Earth’s crust. Argon is a chemical element with atomic number 18 which means there are 18 protons and 18 electrons in the atomic structure. We use cookies to ensure that we give you the best experience on our website. The various species of atoms whose nuclei contain particular numbers of protons and neutrons are called nuclides. 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. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant. For other uses, see, Shuen-Chen Hwang, Robert D. Lein, Daniel A. Morgan (2005). The chemical symbol for Plutonium is Pu. 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. It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. Ytterbium is a chemical element with atomic number 70 which means there are 70 protons and 70 electrons in the atomic structure. The chemical symbol for Manganese is Mn. Thorium is a chemical element with atomic number 90 which means there are 90 protons and 90 electrons in the atomic structure. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Fermium is a chemical element with atomic number 100 which means there are 100 protons and 100 electrons in the atomic structure. According to the Einstein relationship (E=mc2), this binding energy is proportional to this mass difference and it is known as the mass defect. When we use data that are related to certain product, we use only data released by public relations departments and allowed for use. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. The chemical symbol for Niobium is Nb. Ruthenium is a chemical element with atomic number 44 which means there are 44 protons and 44 electrons in the atomic structure. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. 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. Mass was no longer considered unchangeable in the closed system. Because of its closed-shell electron configuration, its density and melting and boiling points differ significantly from those of most other lanthanides. Neon devices were the forerunners of plasma displays and plasma television screens earth as the rare.... 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