Across
- 2. A reaction or process where heat is absorbed
- 3. Circulation of heat in currents
- 9. The same element with the same number of protons with different number of neutrons
- 12. A reaction or process where heat is released
- 13. Heat transferred through touch
- 15. The number of waves that pass a given point in one second
- 19. A negatively charged ion
- 20. A subatomic particle with a negative charge
- 21. Heat that is transferred in waves that doesn't need to be touched
- 23. The mass of an element
- 24. The basic unit of a chemical element
- 25. A subatomic particle that doesn't have a charge but a mass equal to a proton
Down
- 1. One or more electrons in the outer shell of an atom
- 4. The identity of an element
- 5. A subatomic particle with a positive electrical charge
- 6. The smallest particle of a substance
- 7. Any substance that has a defined composition
- 8. The heat required to raise the temperature of the unit mass
- 10. The condition under which two substances in physical contact with each other exchange no heat energy
- 11. The movement of heat
- 14. Relating to an orbit or orbits
- 16. A discrete quantity of energy proportional in magnitude to the frequency of the radiation it represents
- 17. An atom or molecule with a net electric charge due to the loss or gain of one or more electrons
- 18. The distance of one crest to another
- 22. A table that sorts all elements into rows and columns