if you could use all of the chemical energy to lift another kilogram of coal how high could you lift it

This is not a full question, text me and i'll you

You use the atomic number to find out how many protons and neutrons there are in the atom. you use the atomic mass to find out how many protons and electrons there are in the atom. 

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.