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Edexcel A-Level Chemistry AS 2.10 How Ionisation Energies Are Influenced By the Number of Protons in the Nucleus the Electron Shielding and the Sub Shell Questions

Practise explaining first ionisation energy trends using nuclear charge, shielding, subshell energy and paired-electron repulsion.

Syllabus
First assessment 2019
Course
Chemistry YCH11
Level
AS

Exam points

  • compare first ionisation energies using nuclear attraction, shielding and atomic radius
  • explain Be/B or Mg/Al drops by removal from a higher-energy p subshell
  • explain N/O or P/S drops using paired p electrons and increased repulsion

Edexcel A-Level Chemistry AS 2.10 How Ionisation Energies Are Influenced By the Number of Protons in the Nucleus the Electron Shielding and the Sub Shell Questions question 1

[Maximum number: 1]

This question is about the structure of atoms.

Suggest why the fourth ionisation energies of neon and sodium are similar in magnitude even though the elements are in different periods of the Periodic Table.

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