| A | B |
|---|
| element | substance that cannot be changed into simpler substances |
| compound | can be broken down by chemical means but not physical |
| mixture | can be separated by physical means |
| solution | when one substance is dissolved in another |
| heterogeneous mixture | least mixed, does not appear the same throughout |
| homogeneous mixture | appears the same thru out, well mixed |
| proton | subatomic particle with a postive charge |
| electron | subatomic particle with a negative charge |
| ion | Atom that has a charge b/c it's gained or lost electrons |
| isotope | Atoms of the same element with different numbers of neutrons |
| atomic number | Number of protons in the nucleus |
| mass number | Number of protons and neutrons in the nucleus |
