Across
- 1. protons,neutrons in a nucleus
- 4. bottom number on periodic table of a atom
- 5. makes up all elements
- 7. unitofmass to measure molecular weights
- 10. made of atoms
- 11. value for total energy
Down
- 2. protons,neutrons,electrons
- 3. outer of atoms
- 6. top number on the periodic table of a atom
- 8. middle of atom
- 9. protons-electron