Halogens

CHEMISTRY  SSS2 Second Term

WEEK   4

Halogens  

Performance Objectives

The student should be able to:

1. Write the electronic configuration of halogen elements.
2. State at least three physical properties of halogens.
3. State at least two chemical properties of halogens.

Content

Halogens   as   element

The elements fluorine, chlorine, bromine, iodine, and astatine make up a family known as Halogens.

Halogens occupy group7 in the periodic table. They are also known as salt formers. Each halogen atom has seven valence electrons, and this accounts for their similarities in their chemical properties.

        They are highly reactive, and because of their great reactivity, the free halogen elements are not found in nature. In combined form, fluorine is the most abundant of the halogens…