Question

identifying ions
what ion is formed when an atom of mercury (hg) loses two electrons?
○ hg⁻¹
○ hg⁻²
○ hg⁺¹
○ hg⁺²

Explanation:

Step1: Relate electron loss to charge

Losing electrons increases positive charge.

Step2: Determine ion charge

Hg loses 2 electrons: $\text{Charge} = 0 - (-2) = +2$

Answer:

$\boldsymbol{Hg^{+2}}$ (Option: $\boldsymbol{Hg^{+2}}$)