An atom gains two electrons. What is the overall charge now?

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

Type the letter that represents the correct location for each particle type below.

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount