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# How many valence electrons are present in a Potassium atom?

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Solution

## Valence electrons:The electrons which are distributed in the outermost shell of the atom are called valence electrons.Valence electrons in a Potassium atom:The element Potassium$\left(\mathrm{K}\right)$ is in the fourth period and belongs to the alkali metal group (group 1). The atomic number of Potassium$\left(\mathrm{K}\right)$ is 19.The electronic configuration of Potassium$\left(\mathrm{K}\right)$ can be written as $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^{6}4{\mathrm{s}}^{1}$The valence electrons are the electrons present in the outermost shell, that is $4\mathrm{s}$ subshell contains one electron which means, the valence electron is 1.Therefore, the valence electron in a Potassium$\left(\mathrm{K}\right)$ atom is 1.

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