1. Halogens AKA “Salt-Formers” Group 17
Nicole Tomasso, Karen Ruano, and Amy Miller

2. What are the Elements found in the Halogen Family?
Fluorine-F: Found in toothpaste; prevents tooth decay
Chlorine-Cl: Disinfects pool water and drinking water
Bromine-Br: Used to manufacture fire-retardants and pesticides; also used in photographic film
Iodine-I: Makes tincture of Iodine, a common household antiseptic used to treat cuts and scratches
Astatine-At: Radioactive; all isotopes are radioactive; extremely rare
Electron Configuration Formula- np5

3. Electron Configurations
Electron Configuration Formula: np5
Fluorine: 1s2 2s2 2p5
Chlorine: 1s2 2s2 2p6 3s2 3p5
Bromine: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5
Iodine: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p5
Astatine: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p5

5. States of Matter
Fluorine- Corrosive, pale yellow gas. Reactive with all elements.
Chlorine- Green yellow gas.
Bromine- Dark red brown liquid. Readily forms a red brown vapor.
Iodine- Dark gray solid. Readily forms a violet vapor.
Astatine- Radioactive solid. Only occurs as the result of other decaying elements.

6. Metals, Non Metals, or Metalloids?
The Halogen elements are all non-metallic
elements
Non metallic means that there is no metal
in there chemical makeup

7. General Physical Properties
Fluorine and Chlorine are both gases
Bromine is a liquid
Iodine and Astatine are the only solid and their textures are brittle.
There melting points are varied:
F: °C
Cl: °C
Br: -7.2 °C
I: °C
At: 302 °C
They are not good conductors because they are all non-metals. They are not lustrous or malleable.
Astatine is the only radioactive element in the Halogen family.

8. General Chemical Properties
They are highly reactive they are missing one valence electron and like to bond with almost any element so they can receive that missing electron.
Fluorine= one of the most reactive elements in existence. Fluorine is also reactive in small amounts of water.
They usually react with elements with one valence electron.

9. Extra Information
Fluorine is mined as fluorspar, calcium fluoride and cryolite. Chlorine is also found in minerals such as rock-salt, and huge quantities of chloride ions occur in seawater, inland lakes and subterranean brine wells. It is obtained by the electrolysis of molten sodium chloride. Bromine is also found as the bromide ion in seawater, and in brine wells, from which it is extracted. Iodine is mined as sodium iodate which is present in Chile saltpetre. It is obtained by reaction with sodium hydrogensulfite. Astatine only occurs after the decomposition of other elements.

10. Video
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11. Interesting Facts
The halogen family is the only family in the periodic
table that has elements in all three states of matter at
room temperature.
Halogens are one of the most electronegative elements in the periodic table.
Chlorine gas, also known as mustard gas, was used during World War I was the start of chemical warfare.