Antoine laurent lavoisier Chimiste francais(Paris, 1743-Id 1794) Father of modern chemistry unfortunate association with a company organized to collect taxes for King louis adied at guillotine of no use to the New republic of france headless body buried in unmarked grave Showed conservation of mass in chemical reactions invented precise scale to weigh small amounts of matter accurate to 0.0005 grams, about 1/100 of a drop of water -mass of all reactants= mass of all products cannot create matter from nothing can only change form "matter is not created from nothing, only changes form during chemical reactionsFather of modern chemistry ▪unfortunate association with a company organized to collect taxes for King Louis ▪died at guillotine of no use to the New Republic of France ▪headless body buried in unmarked grave Showed conservation of mass in chemical reactions ▪invented precise scale to weigh small amounts of matter accurate to 0.0005 grams, about 1/100 of a drop of water ▪mass of all reactants = mass of all products ▪cannot create matter from nothing, can only change form ▪matter is not created from nothing, only changes form during chemical reactions