Across
- 3. what some cars are made from
- 4. element with one proton
- 6. more than one element
- 8. crystals found in water
- 10. a building block of matter
- 13. sub atomic particle with no charge
- 17. bananas
- 20. what we drink
- 21. what jewelry is made from
Down
- 1. A simple pure substance
- 2. in milk
- 5. what we breath
- 7. a positively charged atom
- 9. in blood
- 11. Tightly packed atom
- 12. salty
- 14. a negatively charged subatomic particle that can be either bound to an atom or free
- 15. what pennies are made from
- 16. outer shell of an atom
- 18. the weight of a atom
- 19. what we drink from cows