Please answer fast. Will give 100 points.

How are isotopes of the same chemical element alike? how are they different?

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?

How many neutrons does an element have if its atomic number is 50 and its mass number is 166