Across
- 5. the symbol for chromium
- 6. element that has the symbol C
- 8. a compound that is used daily
- 9. 2 or more atoms held together by chemical bonds
- 12. within the air
- 15. 2 or more substances not chemically combined together
- 16. one magnesium atom and two chlorine atoms
Down
- 1. numbers on the left side of the periodic table
- 2. the atomic number is 28
- 3. numbers going across the top of the periodic table
- 4. substance made entirely of one type of atom
- 7. what is hydrogens atomic number
- 10. amount of alkali metals on the periodic table
- 11. group 7, period 2
- 13. 2 or more different element held together by chemical bonds
- 14. atomic mass for oxygen