Unit 1: Matter!!!

Which element has 2 valence electrons?

• Mg

• H

• P

• F

Which of the main states of matter has an indefinite volume?

• solid

• liquid

• gas

• plasma

Which of the following is NOT a physical property of matter?

• density

• reactivity

• color

• taste

Which of the three main states of matter has the least kinetic energy?

• solid

• liquid

• gas

• none of the above

What does a sudden change in color tell us?

• the molecules are moving

• there is a physical change

• there is a chemical change

• energy has been added

What kind of change is occurring in the picture?

• physical change

• chemical change

• molecular change

• atomic change

What are the three states of matter?

• solid, volume, mass

• solid, liquid, gas

• density, volume, mass

• density, gas, volume

Something that takes up space and has mass.

• volume

• matter

• mass

• density

Molecules are tightly packed together

• solid
• liquid
• gas

A pure substance that cannot be broken down into other substances by chemical or physical means. 

• compound          
• atom
• mixture 
• element