Question
Question: If elements with principal quantum number n \> 4 were not allowed in nature, the number of possible ...
If elements with principal quantum number n > 4 were not allowed in nature, the number of possible elements would have been –
A
60
B
32
C
4
D
64
Answer
60
Explanation
Solution
n > 4
= 2(1)2 + 2(2)2 + 2(3)2 + 2(4)2
= 2 + 8 + 18 + 32
= 60