Makeup of an atom for a chemist
 
 
 
 
 
 •An atom is composed of
 •
 •The _________ (positively charged) and _______ (uncharged) are found in a very
 small, dense portion of the atom called the nucleus .
 •
 •__________ (negatively charged) surround the nucleus in a very diffuse region
 and have a much smaller mass than the proton and neutron.