| A | B |
|---|
| weighted average mass of an element | atomic mass |
| a sample of matter that has the same composition and properties throughout | substance |
| states that matter is neither created nor destroyed, only changed in form | law of conservation of matter |
| negatively charged subatomic particle | electron |
| positively charged central part of the atom | nucleus |
| positively charged particle in the nucleus of the atom | proton |
| uncharged particle in the nucleus of the atom | neutron |
| elements that generally have a shiny mor metallic luster | metals |
| matter made up of only one kind of atom | element |
| tells you the number of protons in the nucleus of each atom of an element | atomic number |
