Identify the incorrect statement/s: 

i) Planck's original hypothesis was that energy could only be gained or lost in discrete amounts (quanta) with a certain minimum size

ii) Einstein postulated that light itself is quantized.

iii) If the photon has energy less than the threshold energy, an electron is emitted and any excess energy becomes the kinetic energy of the electron.

iv) If a photon that strikes a metal surface has more than the threshold energy, no electron is emitted from the surface.

Calculate the wavelength of radiation that will provide a photon that would reach the energy threshold of iron of 6.878x10^-19 J.

A 87.7 pm photon hits a metal and an electron with 567 eV of kinetic energy is released. Calculate the binding energy in J of the electron.

Calculate the number of photons with the lowest possible frequency needed to ionize a sample containing 6.78x10¹⁸ atoms if the ionization efficiency is 21.54%. The given first ionization energy of the sample is 2.91 aJ.