Question
Which of the following is the smallest cation?(a) $\mathrm{Na}^{+}$$\square$ (b) $\mathrm{Mg}^{2+}$(c) $\mathrm{Ca}^{2+}$$\square$ (d) $\mathrm{Al}^{3+}$
Step 1
The more positive charge a cation has, the smaller it is. This is because the positive charge pulls the electrons closer to the nucleus, reducing the size of the cation. Show more…
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