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. Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 electrons in the atomic structure. K) - Thermal Conductivity 0.235 Specific Heat 0.77 Heat of Fusion 0.657 Heat of Vaporization 51.9 Atomic Number of Phosphorus.Phosphorus – Properties Element Phosphorus Atomic Number 15 Symbol P Element Category Non Metal Phase at STP Solid Atomic Mass 30.9738 Density at STP 1.823 Electron Configuration 3s2 3p3 Possible Oxidation States +3,5/-3 Electron Affinity 72 Electronegativity 2.19 1st Ionization Energy 10.4867 Year of Discovery 1669 Discoverer Brandt, Hennig Thermal properties Melting Point 44.1 Boiling Point 280 Thermal Expansion µm/(m
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