Photons have no charge, no rest mass and travel at the speed of light throuh a vacuum. Electrons have a charge of -1, have rest mass and are part of atoms.
Protons and neutrons have approximately the same mass, but the proton is electrically charged and the neutron isn't. Electrons have a much much lower mass and an opposite electrical charge to that of the proton. That's about as simple as I can get it. It's by no means the only difference between them.
W-bosons are charged and the photons are uncharged, W-bosons have a non zero rest mass and photons hsve zero rest mass. Also the W-boson is the "exchange particle" in interactions involving the weak nuclear force, but photons are the exchange particle of the electromagentic force.
Inside an atomic nucleus, there are protons and neutrons. Due to the nature of how they must interact, they are constantly changing back and forth between each other. Electrons, however, which are found outside of the nucleus, do not change.
chemical deviation
In metallic bonding, the valence electrons freely 'jump' from atom to atom, forming kind of an electron sea.
Photons have no charge, no rest mass and travel at the speed of light throuh a vacuum. Electrons have a charge of -1, have rest mass and are part of atoms.
difference in energy between two levels
They are both energy but Electricty is made up of Electrons and Light is made up Photons.
As excited electrons drop back to lower energy levels in the atom, photons having the energy of the difference between the two electron energy levels are emitted from the atom.
No. Electricity is the movement of electrons, and photons have no electrons to move. Photons are the gauge particles for the electromagnetic force, but that's a different concept.
electrons*
Electrons can absorb photons and gain energy, and they can emit photons and lose energy.
Electrons are usually used depending on the depth of the breast tissues, and the location of the tumour. Electrons do not go as deep into the skin as photons do. If your tumour is close to the surface electrons may be used depending on the doctor that is treating you.
they absorb photons from sunlight
X-ray diffraction is based on photons which are massless particles; neutron diffraction is based neutrons which possess mass and about 1000 heavier than electrons.
From energy in photons
Electrons are very small, and have very small mass, but they are not visible light (photons).