Question

Atomic no of an atom is 16. What are the values of n,ℓ,m,& S for the last electron?

Answer 1

Answer:

Atomic number = 24

So the atom must be Chromium.

Electronic configuration of Chromium ⇒ 1s²,2s²,2p⁶,3s²,3p⁶,3d⁵,4s¹

The quantum numbers for the 21st place of the atom of Chromium

The 21st atom comes under D orbital.  

So the Quantum number n, l , m, s would be  

⇒ principal quantum number , n =3

⇒ angular quantum number , l = 2

⇒ magnetic quantum number , m = +2

⇒ Spin quantum number , s = + 1/2

Hope it Helps . :-)

Explanation: