Question

Which among the given options is an ion with 2 electrons lost?

• A. $N{a}^{+}$
• B. Ca⁺²
• C. O^2-
• D. Cl^-

Answer 1

The correct option is B

Ca⁺²

When an atom loses 2 two electrons, it forms a cation with a charge of +2.
From the given options $N{a}^{+}$ is formed by losing one electron, Ca⁺² is formed by losing two electrons, O^2-is formed by gaining 2 electrons, Cl^- is formed by gaining 1 electron.