Matter Unit Combined Review

A mixture that appears to be evenly mixed throughout:

• an atom
• a compound
• a homogeneous mixture
• a heterogeneous mixture

A pure substance...

• is an element or a compound
• is an element or a mixture
• is a compound or a mixture
• is a mixture

A substance made up of two or more chemically combined elements is

• an element
• mixture
• compound
• solution

 A substance that cannot be broken down into any other substance by ordinary chemical means is called

• molecule
• mixture
• element
• compound

Two or more physically combined substances form —

• a compoud
• an acid
• an element
• a mixture

NaHCO₃ is an example of —

• an abbreviation
• a compound
• a mixture
• an element

A substance made of only one type of atom is called —

• an element
• a mixture
• a compound
• a salt

Which of the following is a way in which elements and compounds are similar?

• Elements and compounds are pure substances.
• Elements and compounds are both made up of different kinds of atoms.
• Elements and compounds can both be broken down by physical means.
• Elements and compounds are listed on the periodic table.

Two or more substances in the same place but NOT chemically combined or in a specific ratio is called —

• a compound 
• a pure substance
• an element
• a mixture

Which of the following represents an element?

• H₂O
• H₂
• NaCl
• CaCO₃