Chemistry · May / June 2017 · Paper 11 · Question 4
5070Atomic structure and the Periodic Table
Which statement about the particles $^{19}_{9}\text{F}^-$, $^{20}_{10}\text{Ne}$ and $^{23}_{11}\text{Na}^+$ is correct?
- AThey all contain more electrons than protons.
- BThey all contain more neutrons than protons.
- CThey all contain the same number of electrons.
- DThey all contain the same number of protons.
As printed in the paper
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Correct answer: C. They all contain the same number of electrons.
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