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5.1.2a Composition of the nucleus and isotopes

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Question 115

An astrophysicist has compiled a list of nuclear equations from various stellar processes and reactors:

  1. 12H+13H→24He+01n^{2}_{1}\text{H} + {^{3}_{1}\text{H}} \rightarrow {^{4}_{2}\text{He}} + {^{1}_{0}\text{n}}12​H+13​H→24​He+01​n
  2. 92235U+01n→56141Ba+3692Kr+301n^{235}_{92}\text{U} + {^{1}_{0}\text{n}} \rightarrow {^{141}_{56}\text{Ba}} + {^{92}_{36}\text{Kr}} + 3{^{1}_{0}\text{n}}92235​U+01​n→56141​Ba+3692​Kr+301​n
  3. 23He+23He→24He+211H^{3}_{2}\text{He} + {^{3}_{2}\text{He}} \rightarrow {^{4}_{2}\text{He}} + 2{^{1}_{1}\text{H}}23​He+23​He→24​He+211​H
  4. 94239Pu→46112Pd+48124Cd+301n^{239}_{94}\text{Pu} \rightarrow {^{112}_{46}\text{Pd}} + {^{124}_{48}\text{Cd}} + 3{^{1}_{0}\text{n}}94239​Pu→46112​Pd+48124​Cd+301​n

Which equations show nuclear fusion?

A

1 and 2

B

1 and 3

C

2 and 4

D

3 and 4

Markscheme

5.1.2a Composition of the nucleus and isotopes Questions

  1. IGCSE
  2. /Physics
  3. /5.1.2a Composition of the nucleus and isotopes

170 exam-style questions on CIE IGCSE Physics 5.1.2a Composition of the nucleus and isotopes. Each one has a worked solution and a mark scheme showing where the marks go.

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