What is the total number of valence electrons in a silicate ion,SiO₃2-?

Name: What is the total number of valence electrons in a silicate ion,SiO₃2-?
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Question

Quizplus · Accepted Answer

Silicate ion, SiO₃²⁻ has one silicon atom, Si and three oxygen atoms, O. 
The electronic configuration of Si is 1s²2s²2p⁶3s²3p².
Each oxygen atom has 6 valence electrons.
Hence, the total number of valence electrons in SiO₃²⁻ ion is: 
(1 x 4) + (3 x 6) + 2 = 24.

What Is the Total Number of Valence Electrons in a Silicate