What is the (a) momentum, (b) speed, and (c) de Broglie wavelength of an electron with kinetic energy of 120 eV.

De Broglie proposed the wave nature of electrons suggesting matter waves. Find the momentum, speed and De-Broglie wave length of an electron with Kinetic energy of 120 eV

Find the de Broglie wavelength of an electron with kinetic energy 9.6xx10^(-19) J .

What is de-Broglie wave?