| A | B |
|---|
| atomic number | number of protons in an atom |
| mass number | number of protons and neutrons in an atom |
| density | how much mass is contained in a specific volume, how much "stuff" has an object |
| density formula | density equals mass divided by volume |
| volume formula | length x width x height |
| volume displacement | final volume - initial volume |
| proton | positive charge located in nucleus |
| neutron | neutral charge located in the nucleus |
| electron | negative charge located outside the nucleus on the orbitals |
| nucleus | central part of the atom that contains the protons and neutrons. Contains most of the atoms weight. |
| orbital | part of the atom where the electrons move |
| sink | density of the object is greater than the density of the liquid |
| float | the density of the object is less than the density of the liquid |
| size and density | the density is not dependent on size |
| factor of density | the more tightly compacted atoms are, the denser the material |
| matter | has mass, takes up space, has a state, made up of atoms |
| examples of matter | Mars, rock, oxygen, bacteria, cells |
| nonexamples of matter | energy, emotions, forces |
