Question

27. If elements of quantum number greater than n
were not allowed, the number of possible elements
in nature would have been :

1. 1/2n(n+1)

2.{ n(n+1)/2}^2

3. 1/6n(n+1)(2n+1)

4. 1/3n(n+1)(2n+1)​

Answer 1

Answer:

Correct option is

D

3

1

n(n+1)(2n+1)

n

th

shell can hold upto 2n

2

electrons

Total number of possible elements would be ∑

1

n

2n

2

=

3

n

(n+1)(2n+1)