Across
- 2. what we call the columns on Periodic Table
- 4. atom with same protons and electrons
- 7. All of the elements organized on this
- 9. element with atomic mass of 15.999
- 11. combination of two or more different atoms
- 15. element with atomic number of 23
- 17. neutral charged particle
- 19. negatively charged particle
- 20. any combination of two or more atoms
Down
- 1. variation of an element with more neutrons
- 3. element after potassium
- 5. Number of protons in an element
- 6. what we call rows on Periodic Table
- 8. element with 1 proton
- 10. electrons on the outer shell
- 12. electrons are located in these
- 13. the center of an atom
- 14. atom with more protons than electrons
- 16. positively charged particle
- 18. the 2nd element in the 18th group