DP Chemistry (last assessment 2024)

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Question 18M.2.sl.TZ2.b.ii

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Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.2.sl.TZ2.b.ii
Level sl Paper 2 Time zone TZ2
Command term Outline Question number b.ii Adapted from N/A
b.ii.
[Maximum mark: 2]
18M.2.sl.TZ2.b.ii

The emission spectrum of an element can be used to identify it.

Elements show trends in their physical properties across the periodic table.

Outline why the ionic radius of K+ is smaller than that of Cl−.

[2]

Markscheme

K+ 19 protons AND Cl– 17 protons

OR

K+ has «two» more protons

same number of electrons/isoelectronic «thus pulled closer together»

[2 marks]

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