Periodtic Table

2. Most common noble gas, making up nearly one percent of the earth's atmosphere.
3. Atomic number 5, a nonmetallic solid
6. Found in all atoms and acting as the primary carrier of electricity in solids.
7. Atomic number 8 and the life-supporting component of the air
8. Colorless, odorless, highly flammable gas
12. Soft silver-white metal
14. Airlike fluid substance which expands freely to fill any space available
16. Colorless, odorless, inert monatomic gas
18. Strong, hard magnetic silvery-gray metal
19. Flowing freely but of constant volume.

1. Symbol C and atomic number 6.
4. Electrical semiconductors
5. Positive electric charge equal in magnitude to that of an electron, but of opposite sign.
8. Reactive nonmetallic elements that form strongly acidic compounds with hydrogen
9. Use in jewelry and decoration
10. Symbol N, is the chemical element of atomic number 7
11. Atomic number 30. It is the first element of group 12
13. Solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity
15. Firm and stable in shape; not liquid or fluid
17. Abundant, multivalent non-metal