periodic table
Across
- 1. the atomic weight is 19
- 5. N
- 7. I have 6 neutrons in group 14
- 10. my atomic number is 111
- 12. I have 16 neutrons in group 15
- 14. 18,1
- 15. Sn
- 16. Ne
- 17. I have 55 protons
- 18. 17,4
- 21. I have 27 protons
Down
- 1. a row is called
- 2. I have 26 electrons
- 3. 15,2
- 4. uncharged atomic particle that has a mass nearly equal to that of a proton and is present in all known atomic nuclei except the hydrogen nucleis
- 6. a column in a periodic table is called
- 8. As
- 9. a small, positively charged particle of matter found in the atoms of all element
- 11. Ag
- 13. I have 8 neutrons in group 16
- 19. Hg
- 20. Au
- 22. I have 6 neutrons in group 13