Question

» Rewrite the following sentence using Indirect
speech:
"It would be nice to go to the concert. I don't know when we'll get another opportunity," She said to her mother.
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Answer 1

Explanation:

In insulators the valence band is fully occupied with electrons due to the covalent bonds. The electrons can not move because they're "locked up" between the atoms. ... This prevents the band gap, which lies in-between the valence band and conduction band.