What we want is a means to cope with macroscopic, as opposed to microscopic, amounts of matter. We want a device of sum that relates quantities of substances on a 안전놀이터 scale that we can easily connect with.

elegance marksare typically harmless and almost nothing to worry about possibly.

The mass in the proton and neutron change negligibly. The no. of amus will be the atomic mass amount of an atom. Electrons are excluded.