1- (25 points) Estimate the radius and the volume of the gold atom, using the metal density of 19.3 g/cm and the atomic weight close to 197 (Assume that an atom is a sphere with a diameter D, NA=6.02 x 1023 atoms/mole). = 2- (30 points) Binding energy per nucleon of 35Cl is 8.514 MeV. m({H) = 1.007825 u and mn = 1.008665 u where lu=931.5 MeV. a) Find its atomic mass in amu (u) (20 points) b) Answer you found in a) is the mass of the atom or the nucleus? and why? (10 points) 3- (15 points) Show that 1 amu (atomic mass unit) is numerically equal to reciprocal of Avogadro's number. 4- (30 points) An electron starting from rest is accelerated across a potential difference of 5 million volts. (a) What is its final kinetic energy? (10 points) (b) What is its total energy? (10 points) (c) What is its final mass? (10 points)