Across
- 3. positively charged mass located in the center of the atom
- 4. a temperature of Ok
- 6. gas or vapor changes directly into a solid
- 7. positively charged subatomic particle
- 10. result of a force distributed over an area
- 11. number of protons in an atom
- 13. system releases energy into its surroundings
- 15. atoms of the same element that have different numbers of neutrons and different mass numbers
- 17. direct relationship between volume and temperature
- 18. substance changes from a solid to a gas
- 19. changes from liquid to a gas
- 20. negatively charged subatomic particle
Down
- 1. particle that has no charge
- 2. collisions of the vapor and walls of the container
- 5. absorbs energy from its surroundings
- 7. substance changes from 1 state of matter to another
- 8. water gains 2261 joules of energy per gram
- 9. the amount of heat necessary to change 1g of a solid to a liquid with no temperature change
- 12. substance changes from a gas to a liquid
- 14. an inverse relationship between the volume of a gas and the pressure of the gas
- 16. number sum of protons and neutrons in the nucleus