1.) how many periods are on the periodic table? are periods the columns or the rows on the periodic table?

How many molecules are found in 1.32 mol of nacl?

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

Which scenario is most similar to the type of collision that gas particles have according to kinetic molecular theory