DP Chemistry (last assessment 2024)

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Question 18N.2.hl.TZ0.a

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

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

Explain the decrease in atomic radius from Na to Cl.

[2]

Markscheme

nuclear charge/number of protons/Zeff increases «causing a stronger pull on the outer electrons» ✔

same number of shells/«outer» energy level/shielding ✔

 

Accept “atomic number” for “number of protons”.

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