Why the valency of the metal ptassium is 1
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Because after filling up its inner shells, there is only one electron remaining.
To complete its octet it loses its 1 electron. So it has valency as 1
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The valency of an element can be defined as the combining capacity of the element. It may also be defined as the number of electrons that must be gained or lost by the atom to attain stability. Potassium has an atomic number of 19, meaning that it has 1 electron in its fourth shell. It loses the electron in this shell in order to attain stability, giving it a valency of 1.
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