Question

electronic configuration for iron is [Ar]3d6 4s2 then quantum number is for iron n= 3 or n=4 please explain sir​

Answer 1

Answer:n=4

Explanation: because the outer most electron enters into 4s2,4 is the principal quantum number(n)

For clear explanation:

Suppose hydrogen atom has electronic configuration 1s1 then the n value is 1.

Chlorine has electronic configuration

1s2 2s2 2p6 3s2 3p5 then the n value is 3 as outer most electron enters into 3p5....