MadSci Network: Chemistry |
Greg, Another manner in which to ask your question is why can't one break down an atom, and I think that once you state the question in that fashion you will already begin to see the answer. As you know, an atom consists of a nucleus comprised of protons and neutrons and a surrounding electron cloud containing at least one electron. The protons and neutrons in the nucleus are held very tightly together in an extremely dense state by an attractive force called the nuclear force. The nuclear force is very different from and much stronger than the electrostatic force that holds the negatively charged electrons around the positively charged nucleus. Although the precise nature of the nuclear force is unknown, it is known that it is only active over a very short range. In order to break down an atom, one would have to impart enough energy to the atom to overcome the attractive nuclear force between the protons and neutrons, so the simplest answer to your question is to say that it is so far impossible for humans to generate this much energy in a controlled fashion in order to do this for almost all the elements. The only exception to that statement is the case of nuclear fission (such as occurs in nuclear power plants and nuclear bombs), but those processes utilize the most unstable isotopes of the most unstable elements. Nuclear fission does break down an element, but the vast majority of "stable" elements are far too stable for nuclear fission to occur.@@ Normal chemistry involves rearranging the electron clouds around atoms in a compound in order to change them from one organization of atoms/elements (one compound) into a different organization of atoms/elements (a different compound). This is possible because the electrostatic forces between nuclei and electrons are far weaker than the nuclear forces within nuclei.
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