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  • Metals and Non - Metals / Chemical Bonding
  • Electronic configurations of some elements are given belo...
Multiple choice

Electronic configurations of some elements are given below. Which element has the lowest first IE?

  1. [He] 2s2

  2. [Ne] 3s2

  3. [Ar] 4s2

  4. [Xe] 6s2

  5. [Rn] 7s2

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The electronic configuration [Xe] 6s2 is of Ba (503 KJ Mol-1) and represents the lowest ionisation energy.

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