Why do covalent crystals typically have a much lower packing density than

Question

metal crystals?

Answer 1

could it be something about attractive forces? https://www.quora.com/Why-are-covalently-bonded-materials-generally-less-dense-than-ionically-or-metallically-bonded-ones

Answer 2

Thanks

Answer 3

Why do covalent crystals have lower packing efficiency

Answer 4

Ans