Chemistry · May / June 2024 · Paper 12 · Question 3
5070Atomic structure and the Periodic Table
In which pair of particles is: • the sum of their charges equal to zero • the sum of their masses almost the same as $\frac{1}{12}$ of the mass of an atom of $^{12}$C?
- Aone electron and one neutron
- Bone electron and one proton
- Cone neutron and one proton
- Dtwo neutrons
As printed in the paper
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Correct answer: B. one electron and one proton
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