| A | B |
|---|
| atomic number | the number of protons in the nucleus of an atom |
| atomic mass | the mass of the nucleus (protons + neutrons) |
| metal | properties include malleable, ductile, conductive, luster |
| non-metal | properties include brittle, poor conductors, dull |
| metalloid | shows properties of both metals and non-metals |
| proton | a positively charged sub-atomic particle found in the nucleus of an atom |
| neutron | a neutrally charged sub-atomic particle found in the nucleus of an atom |
| electron | a negatively charged sub-atomic particle found outside the nucleus in the cloud |
| nucleus | the center of an atom that contains the protons and neutrons |
| ductile | the ability to pull into a wire |
| malleable | the ability to be flattening in a thin sheet |
