Across
- 1. a substance or matter in a state in which it will expand freely to fill the whole of a container.
- 4. a substance that flows freely but is of constant volume.
- 6. the basic unit of a chemical element.
- 8. the negatively charged particles of atom.
- 9. an uncharged elementary particle that has a mass nearly equal to that of the proton.
- 10. Number the number of protons in the nucleus of an atom, which determines the chemical properties of an element.
- 12. a measure of the amount of matter in an object
Down
- 2. firm and stable in shape; not liquid or fluid.
- 3. a substance that is made entirely from one type of atom.
- 5. mass the mass of an atom of a chemical element expressed in units.
- 7. the amount of space that a substance or object occupies, or that is enclosed within a container.
- 11. number the total number of protons and neutrons in a nucleus.