OXFORD 9000
📚 noun • entry_id 5044

boron

/ˈbɔːˌɹɒn/
Meanings (ES + gloss)
boro
The chemical element (symbol B) with an atomic number of 5, which is a metalloid found in its pure form as a dark amorphous powder.
PIRG noted the European Union has a limit of 300 ppm for boron and that there should be a “full-fledged investigation to determine if limits should be established” in the US.
The B₆-type octahedral borons are each bonded to five other boron atoms; four are part of the same octahedron, and one is external to this octahedron.
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