The periodicity of period 3

Hiya :) starting my revision now so thought I'd share these. It covers all you need to know about periodicity of period 3 (Na - Ar) including: diagram showing s,p,d and f orbitals, ionisation energy, atomic radius, melting and boiling points, and states

happy revising :) let me know how you find them! thanks 


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  • Created by: Sophie
  • Created on: 12-11-11 15:48
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Sophie Groves

The periodicity of period three elements

Definition of periodicity
Trends or recurring variations in element properties with increasing atomic number periodicity is
caused by regular and predictable variations in element atomic structure.

Where are the S, P, D and F orbital's located within the periodic table?

The picture…

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Sophie Groves

The general trend of the ionisation energy is that it increases from about 450 kJ mol1 to roughly
1500 kJ mol1. The reason why it increases is because

However, there is a deviation in the ionisation energy for Aluminium (Al) in group 2 which its
ionisation energy is…

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Sophie Groves

The three metals, sodium, magnesium and aluminium:

Melting and boiling point rises across the three metals as there is an increase in the strength of their
metallic bonds. This is because:
The nuclei of the atoms are getting more positively charged, due to the number of
delocalised electrons…

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Sophie Groves


Phosphorous contains p4 molecules. To melt phosphorus you do not have to break any covalent
bonds. You just have to break the much weaker van der Waals forces which are between the


Sulphur consists of S8 rings of atoms. These molecules are bigger than those…


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