What is the number of valence electrons in O2- ion and why?

Open in App

Solution

the valence electron is the ekectron in the outer most shell

we know
O2 has 16 electron altogether
now
O2- means it has gained 2 more electron
thus tota no of electron is 18
now
electron are distributed in shell as follow
2, in first shell
8 in second shell
8 in the third shell and so on
so filiing like this we have
8 electon in last shell that is the third shell

Suggest Corrections

Similar questions

What is the number of valence electrons in :

(a) sodium ion, Na⁺

(b) oxide ion, O^2–

({N a}^{+})

(O^{2 -})

O^{2 -}

S_{2} O_{8}^{2 -}

N_{A}

O^{2 -}

Join BYJU'S Learning Program