| Across |
| 1. |
zero charged particle |
| 2. |
a charged atom |
| 4. |
easily combined |
| 6. |
positively charged particle |
| 7. |
the sum of the numbers of protons and neutrons in the nucleus of an atom |
| 8. |
non-metal+non-metal |
| 10. |
a unit of mass that describes the mass of an atom or molecule |
| 14. |
metal+metal |
| 15. |
around the nucleus |
| 17. |
metal+non-metal |
|
|
| Down |
| 1. |
in the middle of an atom |
| 2. |
an atom that has the same number of protons |
| 3. |
tiny piece of everything |
| 5. |
created the Periodic Table |
| 9. |
makes up everything in the universe |
| 10. |
number of protons of an atom |
| 11. |
the mass of an atom expressed in atomic mass units |
| 12. |
holds quarks together |
| 13. |
negatively charged particle |
| 16. |
the number of groups in the Periodic Table |
|
