1.

vemadumtu

Answer»

if there is 4s2 and 3d4 then 1 electron of 4s goes to 3d4 to make it 3d5 and the final configuration is

Ar 3d5 4s1

are u 100% sure?

yes.. this is the correct answer.

it is found in group 5 period 4 NAA

its atomic no is 23 na

yeah

then 24electrons

yeah

1s2 2s2 2p6 3s2 3p6 4s2 3d4

3d5 half filled orbitals are more stable



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