dating a korean guy - Radioactive dating process

Only through such radioactive decays or nuclear reactions can transmutation, the age-old dream of the alchemists, actually occur.

The mass number, He is two, and therefore the atomic number of the nucleus, the number of protons, is reduced by two.

All of the elements heavier than uranium are man made.

Among the elements are approximately 270 stable isotopes, and more than 2000 unstable isotopes.

Nuclear half-lives range from tiny fractions of a second to many, many times the age of the universe.

For more information on half-life and isotopes, please refer to the Isotopes Project at LBNL where you can also find the Table of Isotopes online.

Nuclei consist of positively charged protons and electrically neutral neutrons held together by the so-called strong or nuclear force.

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.

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.

In 1896, Henri Becquerel was working with compounds containing the element uranium.

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