An atom that has gained an electron will become what type of charged particle?

When an atom gains an electron, it results in an increase in the number of negatively charged particles within that atom. Electrons carry a negative charge, so when you add one to the atom, the balance between the positively charged protons and negatively charged electrons is disrupted. The outcome of this addition is that the atom now has more electrons than protons, which gives it an overall negative charge.

This phenomenon is fundamental in chemistry and physics, as it helps explain the behavior of ions and is integral to understanding chemical bonding and reactions. The other options do not accurately describe the electrical state of the atom when it gains an electron. An atom cannot become positively charged by gaining an electron, nor can it maintain a neutral or chargeless condition after such a change.