If an electron has a measured wavelength of 1.20 *10 - 10 m, what is its kinetic energy? (h = 6.63 * 10 - 34 J.s, 1 eV = 1.6 *10 - 19 J, and me = 9.11 *10 - 31 kg)
A) 209 eV
B) 55.0 eV
C) 105 eV
D) 147 eV
Correct Answer:
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