Drowon red Image Created by HISD Secondary Science After the addition of the iron, the test tube now contains iron (II) sulfate solution and copper particles The iron has become part of a O compound with the sulfate, which can be separated through physical methods mixture with the sulfate, which must be separated through chemical methods Type here to search W hp

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

the atomic mass is the bottom number on the element.

-steel jelly

the answer is minerals.