De brogile wavelength

Chemistry Level 1

Calculate the de Broglie wavelength of an electron moving with velocity $1.0 \times 10^{7} \text{ m/s}.$

1.5 \times 10^{-11}\text{ m}

7.3 \times 10^{-11}\text{ m}

1.5 \times 10^{-10}\text{ m}

7.3 \times 10^{-10}\text{ m}

1 solution

Johan Cappaert
Sep 26, 2020

Planck's constant (h) = 6.62607004 × $10^{-34}$ $m^{2}$ kg / s

rest mass of electron (m) = 9.109 × $10^{-31}$ kg

velocity (v) = 1.0 × $10^{7}$ m/s

h/mv = 7.3 × $10^{-11}$ m