Particle locations in quantum mechanics are not at an exact position, they are described by a probability density function. 1) You may use almost everything for non-commercial and educational use. Uranium is a silvery-white metal in the actinide series of the periodic table. Chemical symbol for Hydrogen is H. Number of protons in Hydrogen is 1. 2) You may not distribute or commercially exploit the content, especially on another website. As the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine. Technetium is the lightest element whose isotopes are all radioactive; none are stable. Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. Density is defined as the mass per unit volume. Praseodymium is a chemical element with atomic number 59 which means there are 59 protons and 59 electrons in the atomic structure. 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“). An atomic orbital is a function that describes one electron in an atom. The chemical symbol for Tantalum is Ta. The chemical symbol for Uranium is U. Its atomic number is 1, and hydrogen has one electron and one proton. Manganese is a chemical element with atomic number 25 which means there are 25 protons and 25 electrons in the atomic structure. Graphic courtesy of ChemicalElements.com The chemical symbol for Samarium is Sm. www.nuclear-power.net. Calcium is an alkaline earth metal, it is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. Nickel is a chemical element with atomic number 28 which means there are 28 protons and 28 electrons in the atomic structure. Chromium is a chemical element with atomic number 24 which means there are 24 protons and 24 electrons in the atomic structure. A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere and is often used with other rare gases in fluorescent lamps. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer (passivation) stabilizes the free metal somewhat against further oxidation. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). The chemical symbol for Rubidium is Rb. Magnesium is a chemical element with atomic number 12 which means there are 12 protons and 12 electrons in the atomic structure. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant. Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. Only about 5×10−8% of all matter in the universe is europium. Symbol: H. Atomic Number: 1. 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. Tellurium is a chemical element with atomic number 52 which means there are 52 protons and 52 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. Silicon is a chemical element with atomic number 14 which means there are 14 protons and 14 electrons in the atomic structure. Nickel belongs to the transition metals and is hard and ductile. On the periodic table of the elements, atomic radius tends to increase when moving down columns, but decrease when moving across rows (left to right). Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife. Gold is a transition metal and a group 11 element. Hydrogen definition, a colorless, odorless, flammable gas that combines chemically with oxygen to form water: the lightest of the known elements. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity, behind only oxygen and fluorine. Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 electrons in the atomic structure. Subatomic particle with a mass close to zero. It is the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure. For a hydrogen atom of a given energy, the number of allowed states depends on its orbital angular momentum. Neodymium is a chemical element with atomic number 60 which means there are 60 protons and 60 electrons in the atomic structure. Iridium is a very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second densest element (after osmium). Francium is a highly radioactive metal that decays into astatine, radium, and radon. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. Promethium is one of only two such elements that are followed in the periodic table by elements with stable forms. Titanium is a lustrous transition metal with a silver color, low density, and high strength. Caesium has physical and chemical properties similar to those of rubidium and potassium. Platinum is one of the least reactive metals. It must be noted, atoms lack a well-defined outer boundary. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. MUON. is a rare earth element with a metallic silver luster. The chemical symbol for Chlorine is Cl. The chemical symbol for Yttrium is Y. Yttrium is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a “rare-earth element”. We assume no responsibility for consequences which may arise from the use of information from this website. The chemical symbol for Cerium is Ce. Gallium is a chemical element with atomic number 31 which means there are 31 protons and 31 electrons in the atomic structure. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, including rapid oxidation in air. Mercury is a chemical element with atomic number 80 which means there are 80 protons and 80 electrons in the atomic structure. Europium is a chemical element with atomic number 63 which means there are 63 protons and 63 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. Pure radium is silvery-white alkaline earth metal. Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. 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