The chart lists four different kinds of atoms.

what is true about all of these atoms?
calcium
gold
argon
lodine

they cannot be solids.
they are the largest units of matter.
they are the only types of atoms that exist.
they cannot be divided.

The major difference is that a histogram is only used to plot the frequency of score occurrences in a continuous data set that has been divided into classes, called bins.  bar charts, on the other hand, can be used for a great deal of other types ofvariables  including  ordinal  andnominal  data sets.