Boron

Definitions

1. A surname.
2. 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.
   uncountable, usually
3. A census-designated place in Kern County, California, United States.
4. A single atom of this element.
   uncountable, usually

Equivalents

Examples

“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.”

“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.”

“For each X point⟳, four borons in the same plane composing a B₆ cluster provide⟳ these orbitals.”

CEFR level