Across
- 3. a group of atoms bonded together
- 6. one of the three main states of matter
- 7. a stable subatomic particle occurring in all atomic nuclei
- 9. the freezing point of water
- 10. a weighted average of all of the isotopes of that element
- 12. the process of turning from liquid into vapor
- 13. consist of a nucleus made of protons and neutrons orbited by electrons.
- 14. the number of protons in the nucleus of an atom
Down
- 1. nearly incompressible fluid that conforms to the shape of its container
- 2. a constituent part: as. a : any of more than 100 fundamental substances that consist of atoms
- 4. the conversion of a vapor or gas to a liquid
- 5. a stable subatomic particle with a charge of negative electricity
- 8. a subatomic particle of about the same mass as a proton but without an electric charge
- 11. refined when experiments showed that light could behave like a stream of particles