The Elements

5. I am the most reactive metal not easily found in nature in the Alkali Metals.
7. I am the most malleable of all the metals.
9. I make up over 70% of the air that you breathe.
10. I am one of the only elements that expand when frozen.
11. I am the 2nd most abundant element in the universe.
12. I am the most reactive metal found in the Alkali Metals.
13. I am the 5th most abundant metal in Earth's crust.
15. I cause the red and green lights of the Aurora Borealis.
16. I am a metal that if placed in your hand I will melt.

1. I am yellow when I am a solid, Red as a liquid, and when I am burned the flame is blue.
2. I am the only metalloid in the Boron Family.
3. Very reactive elements are often stored in me to keep them from reacting.
4. I am the only nonmetal that is a liquid at room temperature.
5. I am the most reactive gas.
6. I am often used in fireworks because of the bright white light it emits when it is burned.
8. I expand when I change from a liquid to a solid.
12. I am the most abundant element in your body.
14. I am the only metal that is a liquid at room temperature.