Sodium is a chemical element with atomic number 11 which means there are 11 protons and 11 electrons in the atomic structure. Lawrencium is the final member of the actinide series. Ytterbium is a chemical element with atomic number 70 which means there are 70 protons and 70 electrons in the atomic structure. Silicon is a hard and brittle crystalline solid with a blue-grey metallic lustre, it is a tetravalent metalloid and semiconductor. Adding a heat will convert the solid into a liquid with no temperature change. For example, carbon has nine possible integer oxidation states from −4 to +4. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. Boron is a chemical element with atomic number 5 which means there are 5 protons and 5 electrons in the atomic structure. See also: Atomic Number – Does it conserve in a nuclear reaction? It is a soft, silvery-white alkali metal. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant. For example, water boils at 100°C (212°F) at sea level, but at 93.4°C (200.1°F) at 1900 metres (6,233 ft) altitude. Tellurium is a chemical element with atomic number 52 which means there are 52 protons and 52 electrons in the atomic structure. The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. 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. It is the electrons that are responsible for the chemical bavavior of atoms, and which identify the various chemical elements. The chemical symbol for Iridium is Ir. Einsteinium is the seventh transuranic element, and an actinide. The chemical symbol for Chromium is Cr. The chemical symbol for Magnesium is Mg. Magnesium is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure. An element that is not combined with any other different elements has an oxidation state of 0. Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. Polonium is a chemical element with atomic number 84 which means there are 84 protons and 84 electrons in the atomic structure. The melting point of ice is 0 °C. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. The chemical symbol for Strontium is Sr. Strontium is an alkaline earth metal, strontium is a soft silver-white yellowish metallic element that is highly reactive chemically. The chemical symbol for Selenium is Se. 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. We use cookies to ensure that we give you the best experience on our website. The total electrical charge of the nucleus is therefore +Ze, where e (elementa… Thulium is a chemical element with atomic number 69 which means there are 69 protons and 69 electrons in the atomic structure. It occurs on Earth as the decay product of various heavier elements. Electron affinity can be either positive or negative value. Ruthenium is found as the free metal, sometimes associated with platinum, osmium and iridium, in North and South America, and in South Africa. Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. The chemical symbol for Nickel is Ni. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). Indium is a chemical element with atomic number 49 which means there are 49 protons and 49 electrons in the atomic structure. The name samarium is after the mineral samarskite from which it was isolated. For example, sodium chloride  (NaCl) is an ionic compound that consists of a multitude of strong ionic bonds. Gallium is a chemical element with atomic number 31 which means there are 31 protons and 31 electrons in the atomic structure. Because of this, the first two rows of the periodic table are labeled the s block. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. Ruthenium, together with rhodium, palladium, osmium, iridium, and platinum form a group of elements referred to as the platinum group metals (PGM). The chemical symbol for Tungsten is W. Tungsten is a rare metal found naturally on Earth almost exclusively in chemical compounds. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Ruthenium is one of the rarest metals on Earth. The chemical symbol for Protactinium is Pa. Protactinium is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. These elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare earth elements. Covalent bonds often result in the formation of small collections of better-connected atoms called molecules, which in solids and liquids are bound to other molecules by forces that are often much weaker than the covalent bonds that hold the molecules internally together. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 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). The standard SI unit is kilograms per cubic meter (kg/m3). A major development was the discovery that steel could be made highly resistant to corrosion and discoloration by adding metallic chromium to form stainless steel. Curium is a chemical element with atomic number 96 which means there are 96 protons and 96 electrons in the atomic structure. Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. 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. Gold is a transition metal and a group 11 element. The chemical symbol for Neon is Ne. Ruthenium compounds also have some nice optical and electronic properties. In the periodic table, potassium is one of the alkali metals. Elemental sulfur is a bright yellow crystalline solid at room temperature. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. In the periodic table, the elements are listed in order of increasing atomic number Z. The temperature at which vaporization (boiling) starts to occur for a given pressure is also known as the saturation temperature and at this conditions a mixture of vapor and liquid can exist together. Most elements have more than one possible oxidation state. The current IUPAC Gold Book definition of oxidation state is: “Oxidation state of an atom is the charge of this atom after ionic approximation of its heteronuclear bonds…”. Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. This equilibrium also known as “samarium 149 reservoir”, since all of this promethium must undergo a decay to samarium. The configuration of these electrons follows from the principles of quantum mechanics. The chemical symbol for Praseodymium is Pr. The motion of individual atoms, ions, or molecules in a solid is restricted to vibrational motion about a fixed point. In nuclear industry cadmium is commonly used as a thermal neutron absorber due to very high neutron absorption cross-section of 113Cd. The chemical symbol for Californium is Cf.

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