Question

state the rules which govern the electronic configuration of elements . show diagrammatically the electron distribution in a sodium atom. atomic number of sodium is 11

Answer 1

The sodium atom loses its outer electron to become a sodium ion. The sodium ion still has 11 protons (11positive charges). Therefore atomic number of sodium ion is also 11. but now only 10 electrons (10 negative charges).
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Answer 2

The  basic electronic configuration of the element is governed by the number of electron in each of the shell of the atom.

Explanation:

• 2n² is the rule that is to be followed for the maximum number of electrons in a given orbital where n is the number of electron orbital serial wise.

• hence the number of electrons in the first shell is equal to 2 and the number of electron in the second shell is equal to 8.

• since sodium has a total of 11 electrons then the third shell of sodium is equal to one electron which it loses during the formation of an ion.

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