DP Chemistry (first assessment 2025)

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Question 23M.2.SL.TZ1.1a

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.2.SL.TZ1.1a
Level SL Paper 2 Time zone TZ1
Command term Outline Question number a Adapted from N/A
a.
[Maximum mark: 1]
23M.2.SL.TZ1.1a
(a)

Outline why ionization energies have positive values but most electron affinities have negative values

[1]

Markscheme

ionization energy breaks bond/attractive force between nucleus and electron
AND
electron affinity forms bond/attractive force between nucleus and electron ✓


Accept for ionization energy “energy needed/endothermic to remove an electron".
AND
for electron affinity “energy released/exothermic adding an electron”.