Which resource is the best for information about current events? biography encyclopedia newspaper

Order the following from smallest to largest atom, electron, quark, proton, neutron, molecule, nucleus

There are main groups in the modern periodic table of elements

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