Compare5 marksStandard
The first four ionisation energies of magnesium are shown in the table.
| Ionisation | Value / kJ mol⁻¹ |
|---|---|
| 1st | 738 |
| 2nd | 1451 |
| 3rd | 7733 |
| 4th | 10543 |
Compare these values and explain the reasons for the trends observed.
CAIE A Level Chemistry 9701 · Atomic structure
Atomic structure: compare question
How this question is marked
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Compare means: Give similarities or differences between two things, and say which side each point belongs to. Write each point as a pair, for example: A is X, whereas B is Y. Two separate descriptions rarely earn the marks.
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