Question

The third period in the periodic table contains only eight elements even though the electron capacity of the third shell is 18. Why?​

Answer 1

Answer:

The third period contains only eight elements even though the electron capacity of the third shell is 18 because when the other shells get filled and the resultant no of electrons becomes eighteen, it gets added up and settles in the third electron shell and three shells are acquired by the fourth period.

Explanation:

Answer 2

Explanation:

QuEsTiOn :-

The third period in the periodic table contains only eight elements even though the electron capacity of the third shell is 18. Why?

AnSwEr :-

1. The number of elements in the first three periods depends on the electron capacity of the shells and the law of electron octet.

2. The electron capacity of third shell is 18. So the third period should actually contain 18 elements. But it contains only 8 elements due to the law of electron octet.