formula writing/naming with polyatomics

Front

What is a polyatomic ion?

Back

A polyatomic ion is a charged species (ion) composed of two or more atoms covalently bonded, which can be considered as a single unit.

Front

Which of the following is NOT a polyatomic ion? OH⁻, CO₃²⁻, PO₄³⁻, Cl⁻, ClO₄⁻

Back

Cl⁻ is NOT a polyatomic ion.

Front

What is the name of the ionic compound Mg(CN)₂?

Back

Magnesium cyanide.

Front

What is the oxidation number of Fe in Fe₂O₃?

Back

+3.

Front

What is the name of FeCl₂?

Back

Iron (II) chloride.

Front

What is the formula for aluminum sulfate given SO₄²⁻ and Al³⁺?

Back

Al₂(SO₄)₃.

Front

What is the charge of the sulfate ion?

Back

The sulfate ion (SO₄) has a charge of -2.

Front

How do you determine the oxidation state of an element in a compound?

Back

The oxidation state can be determined by using the known charges of other ions in the compound and the overall charge of the compound.

Front

What is the formula for ammonium sulfate?

Back

(NH₄)₂SO₄.

Front

What is the difference between a monatomic ion and a polyatomic ion?

Back

A monatomic ion consists of a single atom with a charge, while a polyatomic ion consists of multiple atoms bonded together with an overall charge.