Can a magnet can be changed by hitting it hard or exposing it to heat.

How many atoms are there in 5.70 mol of mg

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.

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work