How do you figure out how many isotopes an element has?

In which phase(s) do the molecules take the shape of the container?

Achemist 16 drop copper metal from copper chloride solution. the chemist place is 0.50 g of aluminum foil in a solution containing 0.75 g of copper (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction?

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?