Which cation may have atomic number 20 and a charge of +2?

Name: Which cation may have atomic number 20 and a charge of +2?
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Question

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The cation with atomic number 20 and a charge of +2 is an ion of calcium (Ca). Choice A is not a valid option as it contains sulfur (S) instead of calcium. Choice B is also not valid as it contains magnesium (Mg) instead of calcium. Choice D is not valid as it does not contain any cation with a charge of +2.

Which Cation May Have Atomic Number 20 and a Charge