Assertion: boron's number | /r/HasProperty | chemical element
Facets:
Source sentences:
text: A trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder Classified under: Nouns denoting substances Synonyms: atomic number 5; B; boron Hypernyms ("boron" is a kind of...): chemical element; element (any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter)