Which statement best describes the basis of the band theory of metallic bonding?

In band theory, the atomic orbitals of many metal atoms overlap and combine into a large number of molecular orbitals, forming energy bands. The metal’s valence electrons can move through these orbitals, which explains electrical conductivity. Core electrons are not the mobile electrons described by the theory, so the best choice is “Atomic orbitals overlap to form molecular orbitals in which the valence electrons of the atoms travel.”

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