What is the alchemical, medical and technological traditions were precursors to chemistry of the contribution the development of the science of chemistry

Using the periodic table, complete the table to describe each atom. type in your answers

According to each substances heat of fusion, which of the items below requires more heat to be added per gram of substance to go from solid to liquid? silver sulfur water lead

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?