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This force is much stronger than the familiar electrostatic force that binds the electrons to the nucleus, but its range is limited to distances on the order of a few x10.The last figure I heard was that there are currently eight nuclear subs on our ocean floors. It doesn't work for sea creatures and other things that are under water. Then they measure how much is left in the specimen when they find it. It comes from cosmic rays that rain down on the earth (and us) from outer space.Since the electric charges of the proton and the electron are 1 and -1 respectively (in units of the proton charge), the net charge of the atom is zero.At present, there are 112 known elements which range from the lightest, hydrogen, to the recently discovered and yet to-be-named element 112.

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