matter

1. a change from one state (solid or liquid or gas) to another without a change in chemical composition
3. the change of state from a liquid to a solid
7. An atom's central core, containing protons and neutrons.
10. A group of atoms bonded together
11. a change of matter from one form to another without a change in chemical properties
13. of matter solid, liquid, gas, plasma
15. gas to solid
17. Liquid to gas
18. negatively charged particle

2. Gas to liquid
4. plasma states of matter
5. 32 degrees Fahrenheit and 0 degrees Celsius
6. A change that occurs when one or more substances change into entirely new substances with different properties.
7. basic unit of matter
8. a small particle in the nucleus of the atom, with no electrical charge
9. solid to gas
12. The change in state from a solid to a liquid
14. 2 hydrogen atoms(+), 1 oxygen atom(-)
16. positively charged particle