A small pot of water has an initial temperature of 80 ° C. It is placed in a cold room where the temperature is 10 ° C. During the next few hours, the amount of thermal energy in the water decreases and its temperature a) decreases to 5 ° C
b) decreases to 10 ° C
c) decreases to 45 ° C
d) decreases to 70 ° C

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 -

Iwannasay c is the most accurate