Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). Atomic Number of Platinum is 78. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. Platinum is a metallic element with the atomic number 78 and the symbol Pt. Atomic mass of Platinum is 195.078 u. The chemical symbol for Thallium is Tl. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal.Its name is derived from the Spanish term platino, meaning "little silver". 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 |. Platinum with the atomic number 78 and an atomic mass of 195 in the periodic table is an extremely rare element found in the crust of the earth. Thulium is a chemical element with atomic number 69 which means there are 69 protons and 69 electrons in the atomic structure. The densest material found on earth is the metal osmium, but its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. Name: Platinum. Number of protons in Platinum is 78. Caesium is a soft, silvery-gold alkali metal with a melting point of 28.5 °C, which makes it one of only five elemental metals that are liquid at or near room temperature. Atomic weight of Platinum is 195.084 u or g/mol. All of its isotopes are radioactive. Know everything about Platinum Facts, Physical Properties, Chemical Properties, Electronic configuration, Atomic and Crystal Structure. Rhenium is a chemical element with atomic number 75 which means there are 75 protons and 75 electrons in the atomic structure. It readily forms hard, stable carbides in alloys, and for this reason most of world production of the element (about 80%) is used in steel alloys, including high-strength alloys and superalloys. The various species of atoms whose nuclei contain particular numbers of protons and neutrons are called nuclides. One atomic mass unit is equal to 1.66 x 10-24 grams. The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. Only about 5×10−8% of all matter in the universe is europium. Francium is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). Group Name: none. By mass, aluminium makes up about 8% of the Earth’s crust; it is the third most abundant element after oxygen and silicon and the most abundant metal in the crust, though it is less common in the mantle below. Chemically, indium is similar to gallium and thallium. The chemical symbol for Europium is Eu. Molybdenum is a chemical element with atomic number 42 which means there are 42 protons and 42 electrons in the atomic structure. The chemical symbol for Caesium is Cs. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Copper is a chemical element with atomic number 29 which means there are 29 protons and 29 electrons in the atomic structure. Units of measure have been defined for mass and energy on the atomic scale to make measurements more convenient to express. Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. Major advantage of lead shield is in its compactness due to its higher density. Our Website follows all legal requirements to protect your privacy. The chemical symbol for Krypton is Kr. In the Periodic table of elements it is a d-block metal and it belong to the 10 th group and 6 … Atomic Mass Number – Does it conserve in a nuclear reaction? The chemical symbol for Tellurium is Te. Platinum is a transition metal element. But its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. The volume of an atom is about 15 orders of magnitude larger than the volume of a nucleus. Cadmium is a soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. 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 Mercury is Hg. The first alloy used on a large scale was bronze, made of tin and copper, from as early as 3000 BC. The chemical symbol for Phosphorus is P. As an element, phosphorus exists in two major forms—white phosphorus and red phosphorus—but because it is highly reactive, phosphorus is never found as a free element on Earth. Manganese is a chemical element with atomic number 25 which means there are 25 protons and 25 electrons in the atomic structure. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226. 1) You may use almost everything for non-commercial and educational use. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. Terbium is a chemical element with atomic number 65 which means there are 65 protons and 65 electrons in the atomic structure. Nickel belongs to the transition metals and is hard and ductile. Atomic Mass Number – Does it conserve in a nuclear reaction? Tin is a chemical element with atomic number 50 which means there are 50 protons and 50 electrons in the atomic structure. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. One atomic mass unit is equal to 1.66 x 10-24 grams. Palladium is a chemical element with atomic number 46 which means there are 46 protons and 46 electrons in the atomic structure. Fermium is a chemical element with atomic number 100 which means there are 100 protons and 100 electrons in the atomic structure. Classified as a transition metal, Platinum is a solid at room temperature. Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. Sodium is an alkali metal, being in group 1 of the periodic table, because it has a single electron in its outer shell that it readily donates, creating a positively charged atom—the Na+ cation. 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. Consequently, the smallest atom is helium with a radius of 32 pm, while one of the largest is caesium at 225 pm. It has the symbol Pt. Because of its high chemical reactivity, barium is never found in nature as a free element. The chemical symbol for Iridium is Ir. Ruthenium is a rare transition metal belonging to the platinum group of the periodic table. Due to the quantum nature of electrons, the electrons are not point particles, they are smeared out over the whole atom. The chemical symbol for Platinum is Pt.. Atomic Mass of Platinum. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Hassium is a chemical element with symbol Hs and atomic number 108. The chemical symbol for Samarium is Sm. It is classified as a transition metal. Oxygen is a colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. 1) You may use almost everything for non-commercial and educational use. Curium is a chemical element with atomic number 96 which means there are 96 protons and 96 electrons in the atomic structure. The chemical symbol for Astatine is At. Therefore the space in an atom (between electrons and an atomic nucleus) is not empty, but it is filled by a probability density function of electrons (usually known as  “electron cloud“).