Identify the number of valence electrons in As^-3. A) 6 B) 7 C) 8 D) 5 E) 2

Question

Quizplus · Accepted Answer

To determine the number of valence electrons, we need to add the valence electrons of each atom and then subtract or add electrons based on the charge. 
As has 5 valence electrons, S has 6, P has 5, and U has 7 (assuming U is uranium). The negative charge indicates an additional 3 electrons are present. 
Therefore, the total number of valence electrons is 5+6+5+7+3= 26. 
So, the correct choice is C, which is 8.

Identify the Number of Valence Electrons in As-3

Identify the Number of Valence Electrons in As^-3