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

1 A substance made up of two or more chemically combinedelements is —

• an element
• mixture
• compound
• solution

1 A substance made up of two or more chemically combinedelements is —

• an element
• mixture
• compound
• solution

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

What is an example of a mixture?

• Table salt
• Salt water
• Oxygen
• Air

What is an example of an element?

• Oxygen
• Pure water
• Air
• Table salt

Which of the following represents an element?

• H₂O
• H₂
• NaCl
• CaCO₃

This picture represents which of the following?

• element
• compound
• mixture of elements
• mixture of compounds