Across
- 1. The smallest particle of an element?
- 3. A positively charged ion is classified as?
- 4. The group 1 metals are called?
- 5. The group 7 elements are called?
- 10. the number of protons and neutrons in an atom are called?
- 11. atoms of the same element with the same number of protons but with different number of neutrons
- 17. Na
- 18. a substance that is formed when two or more electrons are chemically bonded together
- 19. Br
- 20. What are the horizontal lines called on the table?
Down
- 2. The last name of the creator of the periodic table?
- 6. Li
- 7. O
- 8. The attraction of oppositely charged ions?
- 9. A negatively charged ion is called?
- 12. a combination of two or more substances In which each pure substance retains its individual properties
- 13. The point at which a liquid becomes a gas?
- 14. a pure substance that cannot be broken down into simpler substances
- 15. What are the vertical columns called on the table?
- 16. A particle with no charge found in the nucleus?