"Why Big Fr and Hungry F"

1) Francium is the biggest atom because it has 7 electron shells. Since it is so big it doesn't strongly attract it's electrons. This is why it has low IE. Fr has low EN because it is trying to get rid of its electrons in order to gain a full valence shell.

2)Since helium is so small is keeps its valence electrons close to its nucleus. This in return, gives helium a high IE.

3) Noble Gases, don't have an EN value because they are nonreactive, and don't gain or loose electrons.

4) Since fluorine is a halogen (an element with 7 valence electrons) it is "hungry" for 1 more valence electron. It also is the smallest element, not including  helium, which gives it the highest IE.

Iodine is element #53

 Iodine

1)  Latin: Iodum, Czech: Jod, Croatian: Jod. The word Iodine came from the Greek word meaning "iodes", or "meaning violet or purple". (wikipedia.com)  

2) "iodine is a bluish-black, lustrous solid."(wikapedia.com)

3)               I-127

Isotope	Atomic mass (ma/u)	Natural abundance (atom %)	Nuclear spin (I)	Magnetic moment (μ/μN)
127I	126.904473 (5)	100	5/2	2.81328

4) Iodine has 53 electrons and 5 shells of electrons.
5) The atomic mass of iodine is 140 x 10^-12 
6) It's density is 4940  kg m^{-3, its melting point is at 386 degrees Fahrenheit and its boiling point is at 457 degrees Fahrenheit
7) Their is 200 ppb of iodine in our bodies, 490 ppb in Earth's crust, and 1 ppb in the universe.}
8)iodine chloride ICl- has a ruby red color, and is a crystalline solid.

Iodine Fluoride IF- an unstable solid at -45 degrees Celsius

9) Iodine was discovered by Bernard Courtois in 1800
10) Iodine is used in mostly in the medical field:
      -The stable iodine isotope is used for maintaining good health. A deficiency of Iodine causes Hypothyroidism.
      -The radioactive Iodine isotope is used in radioactive Iodine therapy.
11) Extreme iodine deficiency can cause mental retardation. Found in some seafood."Iodine and its compounds are primarily used in nutrition, the production of acetic acid and polymers. Iodine's relatively high atomic number, low toxicity, and ease of attachment to organic compounds has made it a part of many X-ray contrast materials in modern medicine." (Wikipedia.com)
12) REFERENCES:
http://en.wikipedia.org/wiki/Iodine
http://webelements.com/iodine/

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Hello, my name is Raul. I love movies, video games, and good conversation.

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