So,do we write the E C of Zn as : 1s2 2s2 2p6 3s2 3p6 4s2 3d10 OR 1s2 2s2 - Chemistry - Classification of Elements and Periodicity in Properties

Question

So,do we write the E C of Zn as : 1s2 2s2 2p6 3s2 3p6 4s2 3d10 OR
1s2 2s2 2p6 3s2 3p6 3d10 4s2 Which one of them is correct?Also if
the 2nd one is correct won't the E C of Zn 2+ be 4s2 3d8?

Chanchal Rani Sharma · Accepted Answer

Dear Student,
The correct electronic configuration of Zn is 1s2
2s2 2p6 3s2 3p6
3d10 4s2 For Zn+2, two electrons
are removed from s subshell as for transition metals 4s has higher
energy than 3d(exception from afbau),thus for Zn+2, the
electronic configuration will be 1s2 2s2
2p6 3s2 3p6 3d10
4s0
Regards,

So,do we write the E.C of Zn as : 1s2 2s2 2p6 3s2 3p6 4s2 3d10 OR 1s2 2s2 2p6 3s2 3p6 3d10 4s2. Which one of them is correct?Also if the 2nd one is correct won't the E.C of Zn 2+ be .........4s2 3d8?