Part 1 of Essay
During the twentieth century scientists have discovered how to unleash the most powerful energy of all; . The study of began for the same reasons that most scientific studies are begun; to understand more about the universe and the laws by which the universe works. The more knowledge we have about the universe, the more ....

Part 2 of Essay
.... of determining these tiny weightd by using special labratory instruments. Hydrogen is the lightest of all atoms and carbon atoms weigh twelve times more than the hydrogen atom. Atoms that make up one alement are not like atoms that make up another element. These (atoms) are not simple particles, their structure is very complexe. They are, in fact, made up of smaller bits of matter called subatomic particles. An atom has two parts. Those two parts are; 1)at the center is a nucleus, a densely packed cor ....