| A | B |
|---|
| nucleus | the dence positvily charged mass located in the center of an atom |
| proton | a positivily subatomic particle that is found in the nucleus of an atom |
| electron | a negativily charged particle found in the space outside of the nucleus |
| neutron | a nuetral subatomic particle found in the nucleus |
| atomic number | a # for each element that ='s the # of protons in an atom of that element |
| atomic mass | 1/12 the mass of a carben - 12atom |
| osatope | atoms of a given elemnts that have a different numbers of netrons and different mass numbers |
| mass | the amount of matter in an object |
| orbitals | a region of space around the nucleus where an electron os likley to be found |
