Quick answer: Exothermic reactions mean that heat has escaped the system. The answer is A. Heat is released.
about 43001 is it i think
Idk if this is the information you need but the energy level gets higher the farther you move down the Periodic Table. Every element in a vertical line has the same energy level.
The answer is 1.5*10^-12 square meters. For a detailed calculation, please refer to the attachment.
It will probably zip far from you and join itself to an adjacent molecule or atom. it gets to be distinctly radioactive when its core contains an excessive number of or an excessively couple of neutrons. Attempt to keep an indistinguishable number of neutrons and protons from you construct your iota. In the event that the awkwardness is excessively extraordinary, radioactive rot will happen.