gcsescience.com                                       23                                       gcsescience.com

The Periodic Table

What are the Halogens?

The halogens are fluorine, chlorine, bromine, iodine and astatine.
Astatine is radioactive and is not studied at GCSE.
The halogens are in group 7 on the right of the periodic table.
See the halogens for shortcuts to the pages of this section.

What is the Structure of the Halogens?

The halogens are all diatomic covalently bonded molecules.
Diatomic means that each molecule contains two atoms.
The formulae are F2, Cl2, Br2, I2, (see the structure of chlorine).

How do the
Halogens React with other Substances?

All of the halogens will either
1. gain one electron from a metal to form an ionic bond
2. share one electron with a non-metal to form a covalent bond.
For example, see hydrogen chloride or the structure of chlorine.

back       Links       The Halogens       Revision Questions       next

gcsescience.com    The Periodic Table    Index    Periodic Table Quiz    gcsescience.com

Home      GCSE Chemistry      GCSE Physics

Copyright © 2015 gcsescience.com. All Rights Reserved.