Explain4 marksStandard
Neon has two naturally occurring isotopes, and .
Explain what is meant by the term isotope, and explain why these two isotopes of neon have the same chemical properties but different physical properties.
CAIE A Level Chemistry 9701 · Atomic structure
Atomic structure: explain question
How this question is marked
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Explain means: Give the reasons or the mechanism: why or how something happens. Link each point to the next with because, so or which means. A list of facts with no links usually loses the reasoning marks.
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