Across
- 2. power to do something.
- 5. a load carried by something.
- 7. chemical element of atomic number 86.
- 8. found in every pure element.
- 10. the characteristics of a wavelength.
- 12. a light.
- 14. the distance between two successive crests.
- 15. a factor that can be changed
- 17. something to use to hold a rocket.
- 18. a positive charge.
- 19. relating to the atom
- 22. used to make a discovery.
- 24. a basic unit.
Down
- 1. a very hot spot on the surface.
- 3. the process of sending energy.
- 4. when they have an imbalance of neutrons and protons.
- 6. the central part of an atom.
- 9. a zero charge.
- 11. the chemical element with atomic number 6
- 13. a negative charge.
- 16. the speed and direction of something
- 20. a force.
- 21. measured by the amount of mass per unit volume
- 23. a measure of an amount.