Use hormone and feedback mechanism in the same sentence

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?

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom