DP Chemistry (first assessment 2025)

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Question 23M.1A.SL.TZ1.5

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.1A.SL.TZ1.5
Level SL Paper 1A Time zone TZ1
Command term Question number 5 Adapted from N/A
5.
[Maximum mark: 1]
23M.1A.SL.TZ1.5

Which statement best explains the first ionization energy of sulfur being lower than that of phosphorus?

A.  Sulfur has more protons than phosphorus.

B.  Phosphorus does not have paired electrons in the outer p sub-level.

C.  Sulfur has an unpaired electron in the outer p sub-level.

D.  Phosphorus is more reactive than sulfur.

[1]

Markscheme

B 

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