Who did the oil drop experiment?

____ frequency, is the minimum frequency required to eject an electron when photons hit the metal surface.

If the kinetic energy of an electron is 5J. Find out its wavelength.

What is the magnetic quantum number of the orbital 2pz?

Total number of nodes for 3d orbital is ____

Write the values for l, n, and m for Ψ3,1,0?

What’s the mass of neutron in terms of electrons mass?

The energy of a hydrogen atom is positive.