Question

what ion is formed when an atom of mercury (hg) loses two electrons?
○ hg3
○ hg2
○ hg+1
○ hg+2

Explanation:

When an atom loses electrons, it forms a cation. The charge of the cation is equal to the number of electrons lost. Here, mercury (Hg) loses two electrons. So the charge on the ion will be \(+ 2\). The notation for an ion is the symbol of the element followed by its charge as a superscript.

Answer:

Hg²⁺ (the fourth option in the given choices)