Across
- 3. Between PNE, it has no mass
- 6. Equals Mass/volume
- 7. The center of an atom
- 8. Same number of protons but different mass
- 10. An atom with a net electric charge
- 11. Place object on balance to find
- 13. electrons in the outermost shell
- 16. The state of the lowest energy for an electron
- 20. Atoms of a positively charged nucleus surrounded by negatively charged electrons
- 21. (%abundance x mass)+ (%abundance x mass)
Down
- 1. horizontal row of the periodic table
- 2. Equal number of protons and electrons
- 4. The rule that states an atom is most stable when it has 8 valence electrons
- 5. Vertical Columns on periodic table
- 9. positive charge
- 12. Number of Protons in Nucleus
- 14. negative charge
- 15. valence electrons of an atom that uses dots around the symbol of the element
- 17. More protons than electrons
- 18. More electrons than protons
- 19. ? = L x W x h