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chem unit 1222

chemistry unit

QuestionAnswer
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
Created by: melissam.krms
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