Question

what is a cation?

an atom that has gained one or more protons to become positively charged

an atom that has lost one or more protons to become negatively charged

an atom that has gained one or more electrons to become negatively charged

an atom that has lost one or more electrons to become positively charged

Explanation:

A cation is formed when an atom loses electrons. Protons are in the nucleus and are not lost or gained in normal chemical processes. Losing electrons (which are negatively charged) makes the atom have more protons (positively charged) than electrons, resulting in a positive charge.

Answer:

d. an atom that has lost one or more electrons to become positively charged