Answer:
to compare the data she has got?
When atoms and molecules speed up or slow down, that is a physical change. When they change state from liquid to solid or from gas to liquid, that is a physical change. ... The ions or molecules can still come back together to form the original substance
Answer:
3.) 195
Explanation:
Because platinum is 195.079 amu (its on the periodic table)
Answer:
a new discover a new theory