THE STABILITY OF ISOTOPES
2 marks · Easy(a)[1 mark]
State the total number of nucleons in the nucleus of carbon-13.
(b)[1 mark]
Identify the subatomic particles counted as nucleons.
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(a) 13
(b) Protons and neutrons
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Marking points
B1 (a) · 1 mark · States the number of nucleons is 13 for carbon-13
B1 (b) · 1 mark · Identifies nucleons as protons and neutrons
Worked solution
a) The atomic mass number (mass number) of carbon-13 is 13, so there are 13 nucleons in its nucleus.
b) Nucleons are the protons and neutrons found in the nucleus.