Check the atomic radius of the next elements in the series (N, P).

How does decreasing the gas volume affect the pressure of a gas?

The reaction q+r2=r2q is found to be first order in r2 and

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