A sodium atom of mass 3.82 x 10-20 kg vibrates with simple harmonic motion in a crystal. The potential energy increases by 0.0075 eV when the atom is displaced 0.014 nm from its equilibrium position. Find the ground-state energy. O 5.89 x 10-2 ev 5.89 x 10-3 ev O5.89 ev O 6.89 x 10-3 ev 5.89 x 10-4 ey

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Chapter 39, Problem 017 An electron in the n, state in the finite potential well of of Figure (a) absorbs 650 eV of energy from an external source. U U(x) Ug L. (a) Using the energy-level diagram of Figure (b), determine the electron's kinetic energy after this absorption, assuming that the electron moves to a position for which x > L.

Mass of electron m₀ : 9.1 × 10⁻³¹kg Avogadro number N₂ : 6.02 × 10²³ Charge of electron ℯ : 1.6 × 10⁻¹⁹ C 1 ℯV = 1.6 × 10⁻¹⁹ J Boltzman costant k₃ : 1.38 × 10⁻²³ J/K = 8.6 × 10⁻⁵ ℯV/K R = 8.314 J/K·mol   Q. The equilibrium interatomic spacing and melting point of sodium halide are as follows. Explain the reasons for the observed trend.       NaF NaCI NaBr NaI interval(nm) 0.23 0.28 0.29 0.32 meltingpoint(℃) 988 801 740 660