![]() In the periodic table, the elements are listed in order of increasing atomic number Z. The number of electrons in each element’s electron shells, particularly the outermost valence shell, is the primary factor in determining its chemical bonding behavior. The configuration of these electrons follows from the principles of quantum mechanics. ![]() The chemical properties of the atom are determined by the number of protons, in fact, by number and arrangement of electrons. See also: Atomic Number – Does it conserve in a nuclear reaction? Atomic Number and Chemical PropertiesĮvery solid, liquid, gas, and plasma is composed of neutral or ionized atoms. It is the electrons that are responsible for the chemical bavavior of atoms, and which identify the various chemical elements. ![]() In a neutral atom there are as many electrons as protons moving about nucleus. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10 -19 coulombs. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. The nucleus is composed of protons and neutrons. The atom consist of a small but massive nucleus surrounded by a cloud of rapidly moving electrons. Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. K) - Thermal Conductivity 0.0493 Specific Heat 0.904 Heat of Fusion 0.3317 Heat of Vaporization 1.7326 Atomic Number of Neon.Neon – Properties Element Neon Atomic Number 10 Symbol Ne Element Category Noble Gas Phase at STP Gas Atomic Mass 20.1797 Density at STP 0.9 Electron Configuration 2s2 2p6 Possible Oxidation States 0 Electron Affinity - Electronegativity - 1st Ionization Energy 21.5645 Year of Discovery 1898 Discoverer Ramsay, William & Travers, Morris Thermal properties Melting Point -248 Boiling Point -248.7 Thermal Expansion µm/(m
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