Which of the following are true?

2. For polyatomic molecules, the total number of molecular orbitals (i) depends on the type of bonding. (ii) depends on the temperature. (iii) is the same as the total number of valence orbitals of all the atoms involved in the bonding. 3. Energy bands in solids (i) are groups of electrons that make quantum music. (ii) have widths that depend on the strength of interactions between neighboring atoms. (iii) determine electronic properties of materials