Which s not a particle within an atom a neutron an electron an ion a proton?

An Ion

Explanation:

An ion is a charged particle. When an atom or molecule lose or gain electrons, ions are formed. Positively charged ions are formed when some atom loses its electrons. The other atom that has gained the electrons forms negatively charged ions. Ions are not present inside the atom. Rather, ions are charged atoms.

Example: Na+, K+, Cl-

bacteria could be both, harmful and to us. harmful bacteria could make us sick and probably even by getting the chances of getting a disease, but good bacteria fight it off with your immune system. there is always bacteria everywhere we go. we need to make sure to wash our hands after using the restroom, before eating, after eating, after petting an animal too. so you see, bacteria is everywhere and is harmful or . i hope this . : ) : ) : )

then go eat. lol.brainliest