A-LevelChemistryAtomic structure9701/12 · May/June 2022 · Q181 Mark
Why is the ionic radius of a sulfide ion larger than the ionic radius of a potassium ion?
AIonic radius always decreases with increasing atomic number.
BPositive ions always have smaller radii than negative ions.
CThe potassium ion has more protons in its nucleus than the sulfide ion.
DThe sulfide ion is doubly charged; the potassium ion is singly charged.
✓ Correct answer
C: The potassium ion has more protons in its nucleus than the sulfide ion.
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