Questions: Q35 In chemical notation, the symbol Ca^2+ means a calcium ion that has lost two electrons. a calcium ion that has gained two protons. a calcium ion that has gained two electrons. a calcium ion that has lost two protons. two calcium atoms.

Solution Steps

The chemical notation \(\mathrm{Ca}^{2+}\) represents a calcium ion. The superscript \(2+\) indicates the charge of the ion. In chemical notation, a positive charge indicates a loss of electrons.

The \(2+\) charge means that the calcium ion has lost two electrons. Electrons are negatively charged, so losing electrons results in a positive charge.

Given the options:

• A calcium ion that has lost two electrons.
• A calcium ion that has gained two protons.
• A calcium ion that has gained two electrons.
• A calcium ion that has lost two protons.
• Two calcium atoms.

The correct interpretation of \(\mathrm{Ca}^{2+}\) is that it is a calcium ion that has lost two electrons.

Final Answer