2. Matter Quiz

1. A pure substance that is composed only of identical atoms is classified as

• A compound
• An element
• A heterogenous mixture
• A homogenous mixture

2. Which is a characteristic of ALL mixtures?

• They are homogeneous
• The are heterogenous
• Their compositions are in a definite ratio
• They compositions may vary

3. Each particle contained in hydrogen gas is made up of two identical hydrogen atoms chemically joined together. Hydrogen gas is

• a compound
• an element
• a homogeneous mixture
• a heterogenous mixture

Which substance has a definite shape and a definite volume?

• NaCl(aq)
• Cl2(g)
• CCl4(l)
• AlCl3(s)

In which phase are the particles of a substance most random?

• solid
• liquid
• gas

6. A liquid is poured from a flask into a beaker. Which of the following is true?

• It retains its original volume and shape
• It retains its original volume, but its shape changes
• It retains its original shape, but its volume changes
• Both the volume and the shape change

7. Which sample of CO2 has a definite shape and a definite volume?

• CO2 (aq)
• CO2 (l)
• CO2 (s)
• CO2 (g)

8. Which of the following is a CHEMICAL property of iron?

• It is dense
• It reacts with water
• It has a high boiling point
• It is dull

9. The basic "building block" of matter is

• A proton
• A neutron
• An electron
• An atom

10. Matter that is a pure substance but has a fixed ratio of 2 or more elements is a

• A particle
• A mole
• An element
• A compound