DP Chemistry (last assessment 2024)

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Question 18N.2.sl.TZ0.4b.i

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Date November 2018 Marks available [Maximum mark: 2] Reference code 18N.2.sl.TZ0.4b.i
Level sl Paper 2 Time zone TZ0
Command term Explain Question number b.i Adapted from N/A
b.i.
[Maximum mark: 2]
18N.2.sl.TZ0.4b.i

Properties of elements and their compounds can be related to the position of the elements in the periodic table.

(b.i)

Explain why the radius of the sodium ion, Na+, is smaller than the radius of the oxide ion, O2−.

[2]

Markscheme

isoelectronic/same electronic configuration/«both» have 2.8 ✔

more protons in Na+ ✔

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