The wave function describing a state of an electron confined to move along the x-axis is given at time zero by y(x,0) = ae/ determine, in terms of a and dx, the approximate probability of finding the electron in an infinitesimal region dx centered at a) x 0 b) x a, and c) x 2a dy in which region is the electron most likely to be found?

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 -

Wavelength divides in half and speed stays the same.