Question

What are the units for isotopic abundance?

Answer 1

A soil sample tested in a triaxial compression apparatus failed when the total maximum and minimum principal stresses were 100 kpa and 40 kpa, respectively. The pore pressure measured at failure was 10 kpa. The effective principal stress ratio at failure is

Answer 2

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The vast majority of nuclides, especially the transition metals, occur as a mixture of isotopes, where the atomic mass quoted on the Periodic Table, is the weighted average of the individual isotopes. For example, iron , Z=26 has an atomic mass of 55.8⋅g/mol .

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