Across
- 3. strong metal
- 4. atomic number 3
- 7. mineral in milk that's good for bones
- 9. pennies are made of
- 12. gold and _ are considered valuable
- 13. atomic number 86, noble gas, radioactive
- 16. a shiny silver metal that's also a coin
- 17. atomic number 82 and symbol Pb
- 18. symbol Ru
- 20. atomic number 7
Down
- 1. balloons are filled with...
- 2. salt is chloride and...
- 5. atomic number 43 on the periodic table
- 6. water is oxygen and...
- 8. closest planet to the sun
- 10. symbol B
- 11. brittle alkaline earth metal, number 4
- 14. the air that we need is...
- 15. atomic number 9, used in toothpaste
- 19. super brights colors are considered...