Name ______Date ______Block ______Matter Reference
1. atom – the smallest unit of an element that can still be identified as that element
2. proton – subatomic particles with a positive charge
3. neutron –subatomic particles that do not have a charge; these particles are neutral
4. electron – subatomic particles with a negative charge
5. nucleus – the center of an atom which contains neutrons and at least one proton
6. mass – the amount of a substance
7. volume - the amount of space a substance occupies
8. density – the relationship between density and volume; calculated by dividing the mass by the volume
9. element – a pure substance with only one kind of atom; all the atoms have the same atomic number
10. atomic number – the number of protons
11. atomic mass – the mass of an atom
12. Periodic Table - an organized listing of atoms from lightest to heaviest
13. molecule - a combination of two or more atoms that are joined together chemically
14. compound - a substance made of atoms of two or more elements that are chemically combined
15. melting point – the temperature at which a substance changes from a solid to a liquid
16. boiling point - the temperature at which a substance changes from a liquid to a gas
17. sublimation - changing directly from a solid to a gas
18. physical change - a change that does not make a substance into a new substance; one or more of a substance’s physical properties is changed
19. chemical change – a change in which one or more new substances are formed
1 Atoms 1 Properties of Matter 2 Elements
2 Periodic Table 2 Reading the Periodic Table
Matter
3 Molecules 3 Compounds
4 States of Matter
3 Mixtures 3 Solutions
5 Physical Changes 5 Chemical Changes