Keyword "tetrels"

2 sites have this keyword listed in their metadata, here's one you may hate:

6 - Carbon
Microscopic view of carbon nanotubes. Carbon's ability to form four covalent bonds enables it to assume numerous allotropic forms, from graphite (molecular sheets), to diamond (crystalline lattice), to fullerenes (tubes and polyhedrons)
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?14 - Silicon mike-smith 1,653 (3.71)