Which of the following compounds does not contain a polyatomic ion? How do you determine this?
calcium carbonate
calcium sulfate
calcium phosphate
calcium sulfide?
calcium carbonate
calcium sulfate
calcium phosphate
calcium sulfide?
1 Answer
Calcium Sulfide:
Explanation:
A polyatomic ion is an ion with multiple atoms.
Polyatomic ions examples:
- sulfate:
"SO"_4^(2-) - phosphite:
"PO"_3^(3-) - ammonium:
"NH"_4^+
Monoatomic ions examples:
- chloride:
"Cl"^- - iron(III):
"Fe"^(3+) - oxide:
"O"^(2-)
Most monoatomic anions end with -ide, such as oxide and fluoride. Calcium