The energy band containing the energy levels of the valence electrons is called the:

1. Electron energies in a crystal group into bands. 2. The outer electrons of the atoms occupy one of them. 3. The energy band which includes the energy levels of the valence electrons is called the valence band. 4. So the answer is the valence band. _Source: NCERT Class XII Physics Part II, Ch 14 'Semiconductor Electronics'_