Name |
Iodine |
Symbol |
I |
Atomic Number |
53 |
Atomic Mass |
126.9045 |
Number of Protons |
53 |
Number of Electrons |
53 |
Number of Neutrons |
74 |
Melting Point |
236.7°F |
Boiling Point |
363.7°F |
Normal Phase |
Solid |
Family |
Halogen |
Period |
5 |
Group |
17 |
Origin of Name |
Greece; "iodes" meaning "violet" |
Date & Place of Discovery |
1811; Bernard Courtois |
Interesting Facts |
1. It is a black-blue solid 2. There is an extinct radioactive isotope is I-129, which has a 15.7 million year life. 3. Helps as a mineral 4. Fairly rare in Earth's crust & solar system 5. 47th most abundant in the solar system |
Common Uses |
1. Used in organic cheeses to help preserve 2. Used to kill and get rid of fungi |