Answer:

boron

AnswerCrossword Clue
BORONFifth element
BORONElement No. 5
BORONB in chemistry
BORONElement used in abrasives
BORONElement used in enamel manufacturing
BORONElement used in glass production
BORONB on a table
BORONElement discovered in 1812
BORONIt precedes carbon on the periodic table
BORONElement with atomic number 5
BORONThe fifth element
BORONElement number 5
BORONB, on the periodic table
BORONB, to a chemist
BORONMetalloid element
BORON...carbide
BORONIts atomic number is 5
BORONElement between beryllium and carbon on the periodic table
BORONWhat a "B" may mean
BORONAtomic number 5
BORONElement in fiberglass
BORONB, to Bohr
BORONElement .5
BORONElement to the left of carbon
BORONNonmetallic element, extremely hard.
BORONA nonmetallic element.
BORONNonmetallic element.
BORONNonmetallic chemical element.
BORONSoap ingredient.
BORONChemical element.
BORONElement.
BORONMetalloid element.
BORONChemical element
BORONElement
BORONNonmetallic element
BORONElement important in nucleonics
BORONElement used in metallurgy
BORONAn element
BORONKernite component
BORONElement in colemanite