General Chem question

[i4everpaki]

Which species has this ground state arrangement?
1s2-2s2-2p6-3s2-3p6-3d10

a. Ni
b. Ni^2+
c. Zn
d. Zn^2+

I thought it was Zn, but the ans key says Zn^2+

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[TexanGal]

Which species has this ground state arrangement?
1s2-2s2-2p6-3s2-3p6-3d10

a. Ni
b. Ni^2+
c. Zn
d. Zn^2+

I thought it was Zn, but the ans key says Zn^2+

Zinc 2+ would be missing the 4s2 orbital electrons - therefore that is the correct answer. Elemental Zn would have a 4s2 before that 3d10.

 

[i4everpaki]

sorry for my lack of knowledge, but if Zn -> Zn^2+ then it going to have same amount of electrons as Ni. Can you explain it to me in more details. if possible?

 

[i4everpaki]

nvm i got it.