Element Compound and Mixture

Which two types of matter are pure substances?

• elements and compounds

• solutions and compounds

• mixtures and elements

Answer explanation

elements and compounds because they are the all the same throughout.

Mercury (Hg)

• Pure substance

• Mixture

Answer explanation

Elements are always pure substances

Air

• Pure substance

• Mixture

Cracker jacks contain peanuts and popcorn. Eve hates peanuts, so she picks out the popcorn and leaves the peanuts in the bowl. Based on this description, cracker jacks are a(n) ________.

• Pure substance

• Mixture

Answer explanation

Since Cracker Jacks have both peanuts and popcorn, they have to be a mixture.

Sugar 

 $C_6H_{12}O_6$  

• Pure substance

• Mixture

Answer explanation

It has a formula, since it has a formula it is a compound.

Mixtures that have the same composition throughout are ____________.

• heterogeneous

• homogeneous

• pure substances

• elements

Answer explanation

The prefix "homo" means same.

Pure water

• heterogeneous

• homogeneous

Answer explanation

Water is a compound. Compounds are homogeneous.

Gold (Au)

• Pure substance

• Mixture

Answer explanation

Gold is an element. Elements are pure substances.

Iron (Fe)

• heterogeneous

• homogeneous

Answer explanation

Iron is an element and elements are homogeneous.

Aluminum (Al)

• element

• compound

• solution

• heterogeneous mixture

Answer explanation

It is on the Periodic Table.