Across
- 3. negatively charged, orbiting subatomic particle
- 7. (amu) SI unit for the mass of an atom
- 8. fixed distances from the nucleus of an atom
- 11. state of matter without a fixed volume or shape
- 13. the ability to do work
- 14. electrons in the outer energy level
- 15. total number of protons & neutrons in the nucleus
- 16. positively charged subatomic particle
- 17. neutral subatomic particle inside the nucleus
- 22. all matter consists of constantly moving particles
- 23. vertical column of the periodic table
Down
- 1. atoms with a different number of neutrons
- 2. measure of the force acting on an object by gravity
- 4. center of the atom
- 5. the number of protons in the nucleus
- 6. area surrounding the nucleus of an atom
- 9. may be positive or negative
- 10. the simplest form of matter w/ unique properties
- 12. path of one object around another
- 18. fundamental particles in protons and neutrons
- 19. applied force per unit area on a surface
- 20. the building block of matter
- 21. form of matter with a definite shape and volume