| Question |
 |
|
| Answer |
|
|
| proton |
a positively charged particle |
| neutron |
an uncharged particle |
| nucleus |
the combination of protons and neutrons at the center of an atom. has a positive charge because of protons |
| electrons |
negatively charged particles that move around outside the nucleus |
| atomic number |
the number of protons in the nucleus of an atom |
| atomic mass number |
the total number of protons and neutrons in an atom's nucleus |
| isotope |
an atom of one element that has a different number of neutrons than another atom of the same element |
| ion |
an atom or group of atoms that has a positive or negative electric charge |
Biology Lab Midterm
