click below
click below
Normal Size Small Size show me how
chem unit 1222
chemistry unit
Question | Answer |
---|---|
What is Atomic mass? | total # of protons and neutrons in the nucleus |
What is Atomic Number? | # of protons an atom has |
Molecules? | a group of atoms that join together to act as a single unit |
Chemistry? | study of matter |
Matter | makes up everything in the universe |
Boiling point | temp. when liquid turns to a gas |
Melting Point | temp. when a solid becomes a liquid |
Physical Change | Change its substance but not ability |