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If an atom has an electron configuration of 2.8.3, then only 3 electrons can involve in bonding.
What exactly are electron configurations?
The distribution of electrons in an element's atomic orbitals is described by its electron configuration. Atom's electron configurations adhere to a standard nomenclature in which all atomic subshells that contain electrons are arranged in a sequence with the number of electrons they each hold expressed in superscript. For instance, the electron configuration of Aluminium is 1S2 2S2 2P6 3s2 3p1.
How many electrons can involve in bonding depends on the valence electron's work.
The amount of electrons an atom must gain or lose in order to achieve the electrical configuration of the nearby noble gas or inert gas is known as valence. "Valence electrons" are described as "non-filled electrons in the outer shells."
Because they have higher energy than the electrons in inner orbits, valence electrons participate in chemical reactions. A specific element's chemical characteristics, such as its valence or valency and the ability to form bonds with other elements, can also be determined by the number of valence electrons that are present. It also provides us with information on the number of unpaired electrons, the number of atoms that can participate, and how easily the atoms can make bonds.
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