| Term | Definition |
|---|
| atom | the smallest building block of matter |
| proton | positive charged particle in the nucleus of an atom |
| neutron | a particle thaqt has no charge in the nucleus of an atom |
| electron | negative charged particle in a nucleus |
| matter | anything that has mass and takes up space |
| atomic number | the number of protons in an atom |
| mass number | the number of protons and neutorns in an atom |
| amu | a measurment used to weigh atoms |
| neutrino | what holds together the center of the atom |
| element | something that only has one type of atom |
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