What should you do if you haven't watched the previous videos on naming chemical formulas?

• Skip to the next video.

• Read a textbook instead.

• Watch the previous videos first.

• Start with this video.

What is a chemical formula?

• A graphical representation of a molecule.

• A textual description of a chemical process.

• A symbolic representation of a chemical compound.

• A numerical representation of a chemical reaction.

In a binary compound, which element is placed first?

• The less metallic element.

• The element with a lower atomic number.

• The more metallic element.

• The element with a higher atomic number.

What should you not use when writing ionic formulas?

• Prefixes

• Subscripts

• Cations

• Anions

What does the Roman numeral in iron(III) oxide indicate?

• The number of molecules.

• The number of iron atoms.

• The number of oxygen atoms.

• The charge of the iron ion.

What do prefixes in covalent formulas indicate?

• The state of matter.

• The type of bond.

• The number of atoms of each element.

• The charge of the ions.

What is the formula for carbon dioxide?

• CO2

• C2O

• C2O2

• CO

Tags

NGSS.MS-PS1-1

How do you write the formula for sulfur dioxide?

• SO2

• S2O2

• SO

• S2O

Tags

NGSS.MS-PS1-1

What is the correct formula for calcium hydride?

• Ca2H2

• Ca2H

• CaH2

• CaH

Tags

NGSS.MS-PS1-1

What is the formula for sodium phosphate?

• NaPO4

• Na2PO4

• Na3PO4

• Na4PO4