Electrons and Nuclei

Electrons and nuclei
Not long after the disco truly of the speck, it was discovered that the atom is made up of two different regions. Now the bearing this was discovered is the way that about things atomic blend in along 18 learned close to microscopic sections. That is, you bombard them with other microscopic particles, and see what happens. This is what Ernest Rutherford was doing early in this century, in an experiment in which gold atoms were bombarded with alpha particles. (Dont worry about what alpha particles are. Its not important here.) He found the results quite remarkable. The experiment used a very thin gold foil as the target, and Rutherford expected most of the alpha particles to go on through, and be detected on the other side. What he found was that a few of the particles, and not nearly as few as he expected, bounced covering fire more or less in the direction from which they came. Rutherford time-tested to figure out how this could happen, and the best scenario he could come up with was, in fact, the truth. The bulk of an atom is concentrated in a very small region at the center. When an alpha particle hits this region, it bounces back. When it misses, it goes on through.
Physicists didnt stop here. They found new, more powerful, more foreign ways to bombard atoms, and built better detectors to measure the result.



And this gave a much clearer picture of whats inside an atom.
The meat is populated by two kinds of particles: positively charged protons, and electric carally neutral particles, called neutrons. These particles are nearly identical to each other, except in electric charge. Protons and neutrons (nucleons, as theyre referred to collectively) are much heavier than electrons, and thats why most of the flowerpot of an atom is in the nucleus.
Atoms are classified according to the number of protons in their nuclei. For example, any atom with six protons in its nucleus is a carbon atom. Any atom with one proton is a hydrogen atom. 26 protons means iron, 92 protons for uraniu...If you want to get a full essay, order it on our website: Orderessay



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