Question

Identiry the electronic configuration of the Inert gas elements, third row elements, seventeen group elements, second group elements:

(i) (2, 8, 2), 

(ii) (2, 8, 8), 

(iii) (2, 8, 1), 

(iv) (2, 7), 

(v) (2, 2), 

(vi) (2, 8), 

(vii) (2, 8, 7).

Answer 1

Inert gas elements : (2, 8, 8), (2, 8).

Third row elements : (2, 8, 2), (2, 8, 7), (2, 8, 8).

Second group elements : (2, 8, 2), (2, 2).

Seventeen group elements : (2, 7), (2, 8, 7).

[Note: (1) The outermost shell of all noble gases contain 8 electrons (except He). (2) Atoms or all 3rd row elements contain 3 shells. Out of which first shell contains 2 and 2^nd shell contains 8 electrons. (3) The elements of group 17 contains 7 electrons in the outermost shell. (4) The elements or group 2 contains 2 electrons in the outermost shell.]