Across
- 2. Gas essential for breathing
- 4. Neutral particle in an atom
- 6. line Divides metals and nonmetals on the periodic table
- 7. Negatively charged ion
- 9. Substance made of only one kind of atom
- 11. Wearing away of metal by chemical reaction
- 15. Positively charged ion
- 16. Mixture of two or more metals
- 18. Smallest unit of matter
- 19. Shiny, conductive element
Down
- 1. table Chart of chemical elements (2 wds.)
- 3. Positively charged particle in an atom
- 5. Element that’s not shiny or conductive
- 8. Charged atom or molecule
- 10. Negatively charged particle
- 12. How easily an element combines with others
- 13. Atoms of the same element with different neutrons
- 14. Group 17 elements on the periodic table
- 17. Amount of matter in an object