Chemistry - Matter Review

How many of the following substances are elements?

 $S$  | $N_2O_4$  | $Fe$  | $O_2$  | $LiF$  | $Sr$  | $Al$  

• 5

• 3

• 4

• 6

Which of the following is NOT a compound?

• $HCl$
  

• $NaCl$
  

• $Cl$
  

• $CO_2$

Which of the following represents an element?

• $H_{2_{ }}O$

• $NaCl$

• $H_2$

• $CaCO_3$

What cannot be broken down into other substances?

• compound

• solids

• mixture

• element

What is made up of two or more elements that are chemically combined?

• element

• mixture

• compound

• solid

This picture represents which of the following?

• element

• mixture

• compound

This picture represents which of the following?

• element

• mixture

• compound

A pure substance containing only one type of atom is...

• element

• mixture

• compound

 $C_2H_6O$  | $C_8H_{18}$  | $CH_3CH_2Br$  | $C_4H_{10}O$  

Which of the following substances have the same number of CARBON atoms?

• substances 1 and 2

• substances 2, 3, and 4

• substances 2 and 3

• substances 1 and 3

Tap water (water, salt & minerals) is an example of a(n):

• Element

• Compound

• Homogeneous Mixture

• Heterogeneous Mixture