DP Chemistry (last assessment 2024)

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Question 22M.1.hl.TZ2.5

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1.hl.TZ2.5
Level hl Paper 1 Time zone TZ2
Command term Predict Question number 5 Adapted from N/A
5.
[Maximum mark: 1]
22M.1.hl.TZ2.5

What is the correct order for increasing first ionization energy?

A.  Na < Mg < Al

B.  Na < Al < Mg

C.  Al < Mg < Na

D.  Al < Na < Mg

[1]

Markscheme

B

Examiners report

The majority of candidates focussed on the general trend of ionization energy increasing across the period and missed out the finer details due to sub-levels. The correct order for increasing first ionization energy was Na < Al < Mg rather than Na < Mg < Al.

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