Calculate the de broglie wavelength (in picometers) of a hydrogen atom traveling at 425 m/s .

To find this wavelength, we work with the equation of (momentum) = (Planck's Constant)/ (wavelength). Momentum is the mass of the atom multiplied by the speed of the atom. Manipulating the variables gives: Wavelength = (Planck's Constant)/(Mass*Velocity). Plugging in the proper values for each gives: (6.626*10^-34)/(1.67*10^-27)*(425), leading to a value of: Wavelength = 0.00933*10^-7 m, or 933 pm when rounded to 3 significant figures.

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 -