Models can be used to obtain information about scientific processes and objects that may be difficult to study in real life. which of the following scientific processes or objects would best be studied by using a model? a. the effects of an antibiotic on a disease-causing bacterium b. the formation of a solar system c. the chemical composition of a protein d. the growth pattern of a pea plant

The answer is B.

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -