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Question

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 PotassiumK is in the fourth period and belongs to the alkali metal group (group 1).
  • The atomic number of PotassiumK is 19.
  • The electronic configuration of PotassiumK can be written as 1s22s22p63s23p64s1
  • The valence electrons are the electrons present in the outermost shell, that is 4s subshell contains one electron which means, the valence electron is 1.

Therefore, the valence electron in a PotassiumK atom is 1.


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