Across
- 2. Smallest unit of matter
- 3. center of an atom
- 4. Substance made of 2 or more elements
- 6. Neutral charge
- 8. atoms of the same element
- 11. Negative charge
- 13. measure of average kinetic energy
- 16. conduct heat and electricity
- 17. energy Energy of motion
- 18. substance made of only one atom
- 19. poor conductors
Down
- 1. Two or more atoms together
- 5. positive charge
- 7. Magnet created by electric current
- 9. Transfer of thermal energy
- 10. Gravitational force on an object
- 12. ______ number is the number of protons
- 14. ______ Number is the total of protons and neutrons
- 15. energy stored energy due to its motion