Chemisty question?

what is the chemical formula for nickel(II)selenide

Answer:
He is correct.

I just wanted to point out that Selenium will take 2 electrons to complete an outer shell of 8 for an octet.
The II in Nickel(II) means it has two electrons to give up.
So it's one to one.

Ni=Se
NiSe

there should be a space between "nickel(II)" and "selenide"

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