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Fossil dating radioactive decay

A graph of the number of neutrons versus the number of protons for all stable naturally occurring nuclei.

Nuclei that lie to the right of this band of stability are neutron poor; nuclei to the left of the band are neutron-rich.

The solid line represents a neutron to proton ratio of 1:1.

Neutron-poor nuclides decay by modes that convert a proton into a neutron.

Electron capture leads to a decrease of one in the charge on the nucleus.

The energy given off in this reaction is carried by an x-ray photon, which is represented by the symbol hv, where h is Planck's constant and v is the frequency of the x-ray.

Binding energies gradually increase with atomic number, although they tend to level off near the end of the periodic table.

This calculation helps us understand the fascination of nuclear reactions.

The energy released when natural gas is burned is about 800 k J/mol.

The reaction is usually accompanied by the ejection of one or more neutrons.

In 1934 Enrico Fermi proposed a theory that explained the three forms of beta decay.

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He argued that a neutron could decay to form a proton by emitting an electron.

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