| Question | Answer |
|---|---|
| positively charged particle in the nucleus of an atom | proton |
| region surrounding an atom's nucleus where one or more electrons are often found | electron cloud |
| negatively charged particle that occupies the space in an atom outside the nucleus | electron |
| one or more atoms of an element having the same number of protons but a different number of neutrons | isotope |
| region at the center of an atom that contains most of the mass of an atom | nucleus |
| an atom that has a charge because it has gained or lost electrons | ion |
| the number of protons in the nucleus of an atom of an element | atomic number |
| uncharged particle in the nucleus of an atom | neutron |
