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Which common cation in ionic compounds is not derived from a metal?
AAmmonium, NH₄⁺
BCalcium, Ca²⁺
CSodium, Na⁺
DPotassium, K⁺
Answer & Solution
Correct answer: A. Ammonium, NH₄⁺
Cations usually come from metals, but the ammonium ion is built from nitrogen and hydrogen, both non-metals.
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