Across
- 7. A type of vaporization in which liquid that is below the surface changes to a gas as a result of heating
- 8. The change in state from solid to liquid
- 9. A pure substance that consists entirely of one type of atom
- 11. The positively charged central core of an atom
- 15. The change of state from a liquid to a gas
- 17. The change of state from a gas to a solid
- 19. The average of the mass of the isotopes of an atom
- 21. The state of matter in which materials have neither a definite shape nor definite volume
- 22. The basic unit of a chemical element
- 23. The change of state from liquid to solid
Down
- 1. A measure of how much matter occupies a given amount of space; i.e. mass/volume
- 2. A type of vaporization that takes place slowly on the surface of a liquid
- 3. The state of matter in which materials have definite shape and a definite volume
- 4. Positively charged particles within an atom
- 5. The change of state from a solid to a gas
- 6. A positively or negatively charged atom
- 10. Negatively charged particles within an atom
- 11. Neutral particles within an atom,; ie they carry no charge
- 12. The state of matter in which materials have a definite volume but not a definite shape
- 13. The change of state from gas to a liquid
- 14. Atoms of the same elements that differ in the number of neutrons they contain
- 16. The number of protons in the atom
- 18. Exact relative mass of a particular isotope of an element
- 20. Anything that has mass and takes up space