Exam 44: Nuclear Structure

The radiocarbon content of ¹⁴C decreases after the death of a living system with a half-life of 5730 y.If an archaeologist working a dig finds an ancient firepit containing some partially consumed firewood and the wood contains only 12.5 percent of the ¹⁴C content of an equal carbon sample from a present-day tree,what is the age of the ancient site?

The mass of is 55.9349 u and the mass of is 55.939 9 u.Which isobar decays into the other,and by what 2 possible processes?

When a neutron decays,a proton and an electron are observed.When the electrons emitted from a sample of neutrons are observed,they are found to have different kinetic energies.This was accounted for by

44 g of petrified wood was found in a petrified forest.A sample showed a ¹⁴C activity of 100 decays/minute.How long has the tree been dead (in years)? (The half-life of carbon-14 is 5730 years and freshly cut wood contains 6.5 × 10¹⁰ atoms of ¹⁴C per gram. )

The reaction energy associated with a nuclear reaction is

Two nuclei which share the same atomic number Z always are

The half-life of ¹³¹I is 8.04 days.Three days after it was prepared,its activity was 0.50 μCi.How many curies (in μCi)were initially prepared?

Find the binding energy per nucleon (in MeV/nucleon)of carbon-12. Assume: M_C = 12.000 000 u M _p = 1.007 825 u M _n = 1.008 665 u U = 1.66 × 10−²⁷ kg

Rutherford's experiment,in which he fired alpha particles of 7.7 MeV kinetic energy at a thin gold foil,showed that nuclei were very much smaller than the size of an atom because

Two isotopes of uranium have the same