Question

(3) Effective atomic number for first transition series is
(a) 36
(b) 54
(C) 86
(d) 18​

Answer 1

Answer:

I think 18 is your answer

Answer 2

The effective atomic number for the first transition series is (a) 36.

• The effective atomic number is the actual atomic number of metal in a coordination complex.
• The effective atomic number is calculated by the formula a = atomic number of metal + electrons donated by ligand + anionic charge - cationic charge.
• The EAN of [Co(NH3)6]3+ = 27 + 6×2 - 3 = 36.
• In this example, Cobalt is the first transition series 3d metal where cobalt atomic number is 27 and 1 NH3 can donate 2 electrons so, 6 NH3 donated 12 electrons.