Question

How can size of anion determine

Answer 1

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Arrange the ions S2–, Cl–, K+, and Ca2+ in order of decreasing size. SOLUTION This is an isoelectronic series of ions, with all ionshaving 18 electrons. In such a series, sizedecreases as the nuclear charge (atomic number) of the ion increases. The atomic numbers of the ions are S (16), Cl (17), K (19), and Ca (20).

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Answer 2

as we know anion means gaining electron it means no.of negative charges increases whereas positive charges remains same

so when negatively charges particles increases the attraction decreases so size increases

ANION>ATOM>CATION

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