If an Electron Has a Wavelength Of $0.123 \mathrm {~nm}$ , What Is Its Kinetic Energy, in Electron-Volts? This Energy

question 181

Multiple Choice

If an electron has a wavelength of $0.123 \mathrm {~nm}$ , what is its kinetic energy, in electron-volts? This energy is not in the relativistic region. ( $m$ electron $= 9.11 \times 10 ^ { - 31 } \mathrm {~kg} , 1 \mathrm { eV } = 1.60 \times 10 ^ { - 19 } \mathrm {~J} , h = 6.626$ $\times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s }$ )

• A) \(99.5 \mathrm { eV }\)
• B) \(60.2 \mathrm { eV }\)
• C) \(80.4 \mathrm { eV }\)
• D) \(19.8 \mathrm { eV }\)
• E) \(124 \mathrm { eV }\)

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