CAIE A Level Chemistry 9701 · Atomic structure
Two isotopes of carbon are carbon-12, , and carbon-14, . Describe what is meant by the term isotopes and explain why these two isotopes have the same chemical properties but different physical properties. Refer to the isotope notation in your answer.
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.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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