Philosophy: The Big Picture Unit 8 What BEST explains what Bertrand Russell meant when he wrote, “This clears up two millennia of muddle-headedness about existence, beginning with Plato.”

A. Plato is highly overrated and should be replaced by Russell.
B. All of philosophy had been considering existence instead of ethics.
C. Russell’s work resolves all past philosophical questions on the topic.
D. No one significant had written philosophy between Plato and Russell.

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 -