Chemistry · May / June 2016 · Paper 11 · Question 5
5070Atomic structure and the Periodic Table
The symbols for two ions are shown. \[{}^{19}_{9}\text{F}^- \qquad {}^{21}_{11}\text{Na}^+\] Which statement is correct?
- AThe fluoride ion contains more electrons than the sodium ion.
- BThe sodium ion contains more neutrons than the fluoride ion.
- CThe two ions contain the same number of electrons as each other.
- DThe two ions contain the same number of protons as each other.
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Correct answer: C. The two ions contain the same number of electrons as each other.
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