![]() It is the Pauli exclusion principle that requires the electrons in an atom to occupy different energy levels instead of them all condensing in the ground state. 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. Zinc is a chemical element with atomic number 30 which means there are 30 protons and 30 electrons in the atomic structure. K) 30.2 Thermal Conductivity 116 Specific Heat 0.39 Heat of Fusion 7.322 Heat of Vaporization 115.3 Atomic Number of Zinc. ![]() Zinc – Properties Element Zinc Atomic Number 30 Symbol Zn Element Category Transition Metal Phase at STP Solid Atomic Mass 65.409 Density at STP 7.14 Electron Configuration 3d10 4s2 Possible Oxidation States +2 Electron Affinity - Electronegativity 1.65 1st Ionization Energy 9.3941 Year of Discovery unknown Discoverer unknown Thermal properties Melting Point 419.53 Boiling Point 907 Thermal Expansion µm/(m
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