If the transfer integral of these particles is small, the repulsion between them can lead to the Mott transition. If these particles are “nearly free” but weakly interact with a periodic potential, Bloch’s theorem can be used to compute their band structure. Superconductivity (10[1])is caused by bound (10[1])pairs (10[1])of these particles theorized by Leon Cooper. (10[1])Places in a lattice where these particles don’t exist are called holes. (10[3])If (10[1])a photon’s energy exceeds a material’s work function, it can eject (10[1])one of these particles in an effect whose description won Albert Einstein the Nobel Prize. For 10 points, name these negatively-charged particles whose orbitals surround the nuclei of atoms. ■END■