If an Electron Has a Measured Wavelength of 1

question 7

Multiple Choice

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 m_e = 9.11 × 10−³¹ kg)

• A) 209 eV
• B) 55.0 eV
• C) 105 eV
• D) 147 eV