Electrons as Waves

Edexcel AS-level PhysicsQuantum PhysicsLesson 5 of 21

Electrons behave as particles as a fixed number of electrons must be removed from an atom to make an ion.

Particles have a charge to mass ratio (specific charge). This property was demonstrated by J. J. Thomson and is a property of particles.

In 1913, Millikan found the charge of an electron in his oil-drop experiment. Electrons have a fixed mass and a fixed charge so they are particles.

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de broglie wavelength: The wavelength associated with a moving particle, equal to the Planck constant divided by its momentum.