Naming & Writing Polyatomic Ions and Ionic Compounds

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

What is the charge of the cyanide ion (CN^-)?

Back

The cyanide ion (CN^-) has a charge of -1.

Front

What is the formula for sodium acetate?

Back

The formula for sodium acetate is NaCH3COO.

Front

How do you determine the formula for a neutral ionic compound formed from calcium and phosphate?

Back

To determine the formula for a neutral ionic compound formed from calcium (Ca^2+) and phosphate (PO4^3-), you need to balance the charges. The formula is Ca3(PO4)2.

Front

What is the formula for ammonium sulfate?

Back

The formula for ammonium sulfate is (NH4)2SO4.

Tags

NGSS.MS-PS1-1

Front

What is the formula for sodium nitrate?

Back

The formula for sodium nitrate is NaNO3.

Front

What is the significance of the subscripts in a chemical formula?

Back

Subscripts in a chemical formula indicate the number of atoms of each element in a molecule or compound.

Front

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

Back

A monatomic ion consists of a single atom with a positive or negative charge, while a polyatomic ion consists of two or more atoms bonded together that carry a charge.

Front

How do you name a polyatomic ion that contains oxygen?

Back

Polyatomic ions that contain oxygen are typically named with the suffixes '-ate' or '-ite'. The '-ate' suffix is used for the ion with more oxygen atoms, while the '-ite' suffix is used for the ion with fewer oxygen atoms.

Front

What is the formula for the sulfate ion?

Back

The formula for the sulfate ion is SO4^2-.