Question 7 (1 point) An electron has a speed of (3.0x10*6) m/s. Calculate the de Broglie wavelength in metres Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer Question 8 (1 point) Calculate the de Broglie wavelength in metres for an electron with energy (5.0x10*2) ev. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer Question 9 (1 point) What energy of photon must be absorbed to cause a transition from n = 3 to n = 4 in the Bohr model of hydrogen? 0.512 ev 0.662 ev 0.939 ev 1.20 ev Question 10 (1 point) What energy of photon must be emitted if an electron drops from the n = 8 state to the n - 2 in the Bohr model of hydrogen? 1.93 ev :245 ev 3.19 ev 4.01 ev