This is the process of matter changing from a gaseous state to a liquid state.

What element breaks down into yttrium-90?

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

What are the similarities of physical and chemical change ?