- Created by: Lauren Brixey
- Created on: 30-10-13 11:33
A period: A period is a horizontal row of elements in the periodic table. Elements show trends in properties across a period.
A group: A group is a vertical column in the periodic table. Elements in a group have similar chemical properties and their atoms have the same number of outer- shell electrons.
Periodicity: Periodicity is a regular periodic varation of properties of elements with atomic number…