Periodic Classification and Periodic Properties - Result Question 46
####43. Arrange the following ions in order of their increasing radii $Li^{+}, Mg^{2+}, K^{+}, Al^{3+}$.
(1997, 1M)
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Solution:
- $Li^{+}<Al^{3+}<Mg^{2+}<K^{+}$. Size decreases from left to right in a period and it increases from top to bottom in a group. Variation is more pronounced in group than in period.
