An α-particle having kinetic energy 4.0 MeV is projected towards tin nucleus (Z = 50). Select the co — Atomic Structure Chemistry Question

💡 Solution & Explanation

At closest approach r0: P.E. = 1.44×10^-13/r = 4.0 MeV => r0 = 3.6×10^-14 m (a). At r=9.0×10^-14: P.E. = 1.6 MeV (b). At r=4.5×10^-14: P.E. = 3.2 MeV, K.E. = 0.8 MeV (c). r cannot go below r0 so (d) is impossible.