Question

what is the name for s²⁻?
a sulfur
b sulfide ion
c sodium ion
d sulfur ion

Explanation:

The symbol S represents sulfur. When it gains two electrons to form S²⁻, it is called a sulfide ion. Sulfur is the element name (S), sodium ion is Na⁺, and there is no common - usage term "sulfur ion" for S²⁻.

Answer:

B. sulfide ion