Evaluating Scientific Explanations Answers

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What ion is formed when an atom of mercury (Hg) loses two electrons?

Hg–1

Hg–2

Hg+1

Hg+2

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An element is made up of only one type of atom.

An element cannot be broken down into a simpler form.

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A compound can be a pure substance.

A compound can be isolated.

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