Question

How many valence electrons are there in the outer shell of Cl\(^{-}\)?

• A. 8
• B. 17
• C. 18
• D. 7

Hint:

The number of valence electrons for an anion is determined by the total electrons in the outer shell after the ion has gained electrons.

Answer 1

The Correct Option is A

Chlorine (Cl) has an atomic number of 17, which means it has 17 electrons. In its neutral state, chlorine has 7 electrons in its outermost shell. However, in the \( Cl^{-} \) ion, chlorine gains one electron, resulting in 8 electrons in its outer shell. Thus, the number of valence electrons in \( Cl^{-} \) is 8.