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2)Determine the approximate mass of the contents five years later. NZQA 90256 2006 Radio-Carbon Dating Cobalt 60 is a beta emitter used in medicine.It is created in a nuclear reactor, and decays with a half-life of 5.2 years. 1)State why the container is made of lead The lead stops beta particles.The radiocarbon dating method is based on the fact that radiocarbon is constantly being created in the atmosphere by the interaction of cosmic rays with atmospheric nitrogen.The resulting radiocarbon combines with atmospheric oxygen to form radioactive carbon dioxide, which is incorporated into plants by photosynthesis; animals then acquire in a sample from a dead plant or animal such as a piece of wood or a fragment of bone provides information that can be used to calculate when the animal or plant died.Because the nitrogen-14 atom has seven neutrons as well as seven protons (7 7 = 14), when a neutron is added in the upper atmosphere (thereby displacing the proton) the new carbon atom has eight neutrons.The stable carbon-12 atom has six protons and six neutrons (6 6 = 12). God, the Father, sent His only Son to satisfy that judgment for those who believe in Him.

Libby received the Nobel Prize in Chemistry for his work in 1960.

The lab also offers C: N, %C and %N measurements on collagen extracted from non-cremated bones in addition to δ15N and δ13C at no additional cost for samples sent for radiocarbon dating.

The lab also provides stable isotope analyses on a standalone basis.

Research has been ongoing since the 1960s to determine what the proportion of in the atmosphere has been over the past fifty thousand years.

The resulting data, in the form of a calibration curve, is now used to convert a given measurement of radiocarbon in a sample into an estimate of the sample's calendar age.