Answer: sulfur

AnswerCrossword Clue
SULFURGunpowder element
SULFURBrimstone
SULFURGunpowder ingredient
SULFURElement in gunpowder
SULFURAtomic number 16
SULFURYellow element that burns with a blue flame
sulfurThe chemical element of atomic number 16, a yellow combustible nonmetal
sulfura non metallic element / to treat with sulfur, also SULPHUR
sulfurA pale greenish-yellow color
sulfurThe material of which hellfire and lightning were believed to consist
sulfurAn American butterfly with predominantly yellow wings that may bear darker patches