Substances and Mixtures

The basic particle from which all matter is made is

• compound

• atom

• mixture

• proton

A substance that cannot be broken down into any other substance is

• an atom.

• a compound.

• an element.

• a subscrpt.

A substance that is made up of 2 or more different elements chemically combined in a set ratio.

• compound

• molecule

• diatomic molecule

• mixture

Water is a compound made up of only

• hydrogen atoms.

• oxygen atoms.

• water molecules.

• It is not a compound.

NaCl, table salt is a compound because

• it is made of 2 different elements chemically combined in a set ratio.

• It is not a compound because it has only 2 atoms.

• It is made up of 2 elements physically combined.

• It is a mixture, not compound.

All molecules are compounds, but not all compounds are molecules.

• False

• True

O2

• is a compound.

• is a molecule.

• is a mixture.

H2 is

• an element.

• is a compound.

• is a molecule.

• is both an element and a molecule.

A molecule

• can be made up of only one type of atom.

• can be made up of more than one type of atom.

• is the smallest unit of a compound.

• all of the above.

How many carbon atoms are in C6H12 O6?

• 12

• 18

• 6

• 24