Question

It can be readilyseen that no of elements in each period is twice the no of atomic orbitals available in the energy level that is being filled means

Answer 1

Answer:

According to the 2n2 rule, the maximum number of electrons in the third period = 2 x (3)2 = 18. But, the last shell cannot accommodate more than 8 electrons so, the number of electrons in third period is 8. Hence, the number of elements is also 8.

Explanation: