Chemistry AQA AS Unit 1 Periodicity

Made these notes for my year 12 summer exam to revise and read over. There are spelling mistakes in most of my files but due to the busy exam schedule I had no time to correct them (sorry).

Most files have more information than what is needed but I feel it helps you feel more confident walking into the exam if you have a greater knowledge background and may help when having to apply knowledge to questions. Good luck :)

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  • Created by: Chelcie
  • Created on: 02-09-13 13:10

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Periodicity
Period 3
Group 1, 2, 3 (Na, Mg, Al) are metals. Giant structures. They lose their out electrons to form ionic
compounds.
Silicon has 4 electrons in its outer shell hence forming 4 covalent bonds. Semi metal.
Groups 5, 6, 7 (Ph, Su, Cl) are non-metals. They either accept…

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The drop in first ionisation energy between groups 2 and 3 (Mg, Al)
This is because the electron in the aluminium p sub shell is already in a higher energy level than the
s-electron in magnesium, so it takes less energy to remove it.

The drop in first ionisation energy…

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This shows that the higher the electrons are on the graph, the closer the electrons are to the nucleus.

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