Question

how many unpaired electrons are present in the ground state of Fe 3+(z=26),Mn2+ (z=25),Argon(z=18)?​

Answer 1

Answer:

5, 5, 0

Explanation:

Fe3+ (26) : 1s2 2s2 2p6 3s2 3p6 3d5 : 5unpaired electrons

Mn2+ : (25) : 1s2 2s2 2p6 3s2 3p6 3d5 5unpaired electrons

Ar (18) : 1s2 2s2 2p6 3s2 3p6

: no unpaired electrons