What does a radioaClive sample emit the largest number of decay particle

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

According to the tide table below what time of day will the highest tide occur?

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?