IdentificationEasy1 mark
3(vii)
Curium is a radioactive element with the symbol (247, 96) Cm Cm named in honour of Madam Curie. The graph of number of protons vs number of neutrons for some elements are shown below :
State the mass number of the daughter nucleus.
Topic: Mass number after radioactive decay
Question wording verified against source paper
Answer
Exam answer
243.
Explanation
One alpha emission reduces the mass number by 4; beta emissions do not change it.
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(a) 3
(b) 4
(c) 7
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