Why does nickel have an expanded octet?

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vuongnaomi1L
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Joined: Wed Sep 30, 2020 9:56 pm

Why does nickel have an expanded octet?

Postby vuongnaomi1L » Wed Dec 09, 2020 11:36 pm

Since nickel has n=4, which means it contains the f-orbitals, is this why it has an expanded octet?

Kristina Krivenko 3I
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Re: Why does nickel have an expanded octet?

Postby Kristina Krivenko 3I » Wed Dec 09, 2020 11:50 pm

Ni is in period 4 and is a transition metal, so it has 3d orbitals that it can use to have expanded octet.

Also, Ni does not have f-orbitals. Remember that f-orbitals lag by 2, so 4f orbitals do not appear until period 6.

Hope this helps :)

Jay Solanki 3A
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Re: Why does nickel have an expanded octet?

Postby Jay Solanki 3A » Wed Dec 16, 2020 4:05 pm

To add to this, Ni2+ is very common in coordination compounds, of which it uses its expanded octet in some cases to form octahedral structures. Just thought I would introduce a biological application. Hope this helps!

Brandon Carris
Posts: 49
Joined: Wed Sep 30, 2020 9:41 pm

Re: Why does nickel have an expanded octet?

Postby Brandon Carris » Wed Dec 16, 2020 7:18 pm

Nickel can end up holding 10 total valence electrons just because of its 4s and 3d subshells.

Nicole Bruno Dis 1B
Posts: 51
Joined: Wed Sep 30, 2020 9:36 pm

Re: Why does nickel have an expanded octet?

Postby Nicole Bruno Dis 1B » Thu Dec 17, 2020 4:04 am

Since nickel contains 2 electrons from the 4s subshell and 8 electrons from the 3d subshell, it can form up to 10 bonds in a coordination compound (hence the reason for the expanded octet).

Sejal Parsi 3K
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Joined: Wed Sep 30, 2020 10:03 pm

Re: Why does nickel have an expanded octet?

Postby Sejal Parsi 3K » Thu Dec 17, 2020 7:52 am

Nickel can hold up to 10 total valence electrons because of its 3d and 4s subshells.


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