1. Element project: Group 17
Abby LaBue
Alex LaBue
Erica Lukaschunis

2. Group 17: Halogens Group 17 consists of 5 elements: Fluorine (F)
Chloride (Cl)
Bromine (Br)
Iodine (I)
Astatine (At)

3. Type of elements
These elements are Non-Metals.

4. Group Configuration

5. Valence electrons
Group 17 has 7 valence electrons, and an oxidation number of -1.

6. State of matter at room temperature
Fluorine- Gas
Chloride- Gas
Bromine- Liquid
Iodine- Solid
Astatine- Solid

7. Practical uses for group 17 elements
Fluorine- Used as fluoride in toothpaste to prevent tooth decay and cavities. Liquid fluorine is also used as a component in rocket fuel. It can also be used to make Teflon- a nonstick coating in cookware.
Chlorine- Most commonly used in bleaching our paper products. Chlorine also is used to purify drinking water and swimming pool water. Chlorine is also used as a disinfectant.

8. Practical uses for group 17 elements (continued)
Bromine- Used to disinfect water, and is present in flame proof agents. It is also used in coal power plants to reduce mercury levels.
Iodine- Used to purify water and as a sterilizing agent. The deficiency of iodine in the human body can affect the thyroid.
Astatine – Astatine 211 is a radioactive tracer and is used in treatment for cancer.

9. Physical properties of the Halogens
Highly reactive with alkali metals
Seven valence electrons
High electro-negativities

10. Chemical reactivity
Chlorine reacts with Sodium to form Sodium Chloride (Table Salt)
Iodine reacts with Bromine to form Bromide
Chlorine reacts with water to form hypochlorite.