<span>Photoelectric effect refer to the emission of electron or free carriers when light shine into a material. According to the Rutherford model, light of any energy should be able to make electrons leave the atom and be emitted.
The energy of the emitted electrons should be related to the intensity of the light. But the energy of the electron is actually only related to the energy of the light</span>
<span>The vaporization of br2 from liquid to gas state requires 7.4 k/cal /mol.</span>
Explanation:
the physical and chemical properties of an element are periodic functions of their atomic number.
