Crossword 1: Atoms and Elements
Across
- 1. O
- 5. spherical layer outside the nucleus where electrons can be
- 10. He
- 11. substance made of one type of atom
- 17. Na
- 19. H
- 20. Li
- 21. C
- 25. N
- 26. groups 1-2 of the periodic table
- 28. neutral subatomic particle in the atomic nucleus
- 29. one of the 18 columns on the periodic table
- 30. center of the atom made of protons and neutrons
Down
- 2. negatively charged subatomic particle outside the nucleus
- 3. Ar
- 4. S
- 6. Si
- 7. F
- 8. P
- 9. Be
- 12. Ne
- 13. groups 13-18 of the periodic table
- 14. Al
- 15. Cl
- 16. one of the 7 rows of the periodic table
- 18. Mg
- 22. basic building block of matter
- 23. B
- 24. positively charged particle in the atomic nucleus
- 27. number of protons in the nucleus of an atom