Homework Chemistry 1

 

DIRECTIONS: ANSWER THE QUESTIONS BELOW IN COMPLETE SENTENCES.

 

1) What is the difference between a chemical and a physical change?

 

 

 

 

2) What is the difference between a solid and a gas?

 

 

 

 

3) From the reactions below, state whether a physical or chemical change will occur:

Reaction	Physical or Chemical Change?
WATER BOILING
ICE CUBE MELTING
CHALK MIXING WITH VINEGAR
CEREAL MIXING WITH MILK
IODINE MIXING WITH STARCH

 

4) REVIEW: Use the words element, atom, protons, neutrons and electrons in a couple of sentences below.

 

 

 

 

 

5) REVIEW: What is the nucleus of an atom? Where is it found?

 

 

 

 

 

6) REVIEW: What is atomic mass?