What this practice covers
These questions are drawn from past CIE 0620 Chemistry papers and filtered to arrangement of elements. You answer, you find out immediately whether you were right, and you get the reasoning for the correct option and for each distractor. Wrong answers go to a mistakes locker so you can come back to exactly those.
Practice is free. You need an account only so your progress and your mistakes are still there next time.
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What examiners see students get wrong here
These are the errors that cost marks on arrangement of elements, taken from our own topic notes. Read them before you practise and you will recognise the traps in the questions.
- Saying the elements are arranged in order of relative atomic mass.
- Confusing periods with groups, so quoting the period number as the number of outer electrons.
- Giving a Group VI ion a 6+ charge instead of 2−.
- Explaining similar chemistry within a group by similar mass rather than by outer shell electrons.
- Expecting carbon to form C<sup>4+</sup> ions rather than covalent bonds.
- Saying metallic character increases across a period.
- Predicting a value beyond a data table without checking whether the steps are getting bigger or smaller.
Revise it first
If any of the above is unfamiliar, work through the notes before practising: Arrangement of elements revision notes.