Ihave an atom of an unknown element. it has a mass or 57 with 30 neutrons. this must be an isotope of what element

The mass number of an atom is the summation of its proton and neutron.
Since the unknown atom has a mass of 57 and neutron number of 30, that means the number of proton is 27.
An element usually have the same number of proton and electron and this number represent the atomic number. The element with atomic number 27 is Cobalt.
Cobalt suppose to have 27 protons, 27 neutrons and 27 electrons. Thus the unknown atom with 30 neutrons is probably an isotope of cobalt.

Atp is is our little "pocket" of energy. of course, if you have too little, then it means you have too little energy, and you'll pass out. the way to not have enough, is to have no energy sources (glucose, fats, proteins). you can't have too many atp molecules. cycles like the krebs cycle produce it, but if you have too much of any substrate (or too little for that matter), the cycle stops and atp is no longer made (it stops until substrate levels are such that the process can go on). in any case, this is unlikely since atp is constantly hydrolyzed and remade, even while you're asleep. you won't have too much. if you have zero, you are dead or dying.