First Ionisation Energy
Outlining what first ionisation energy is, factors that determine the first ionisation energy of an element and how first ionisation energy changes across a period and down a group in the periodic table. Exceptions to the general trend across periods 2 and 3 for group III and group V elements are explained fully using examples.
For AQA, OCR (A), Edexcel and CIE A-level and IB Chemistry.
Recap: 00:40
What is first ionisation energy?: 02:35
Factors that effect first ionisation energy: 04:16
Example - 1st I.E of sodium and potassium: 05:50
Down a group: 06:46
Across a period: 09:01
Exceptions across a period (group III and group V elements): 11:05
Example - 1st I.E of Aluminium compared to Magnesium: 12:03
Example - 1st I.E of Sulphur compared to Phosphorus: 13:55
Summary: 15:12
Relevant Videos:
Atomic Structure - • Atomic Structure
Atomic Orbitals - • Atomic Orbitals (A-Level IB Chemistry)
Pages on chemistrystudent.com:
https://www.chemistrystudent.com/firs...
https://www.chemistrystudent.com/atom...
https://www.chemistrystudent.com/elec...
https://www.chemistrystudent.com/elec...
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