Select the statement that is falseGroup of answer choicesActivity is proportional to the number of nuclei in the sampleThe rate of decay depends on the number of nuclei presentC-14 dating is appropriate for objects up to one million years oldA high activity corresponds to a short half-life

Select the statement that is falseGroup of answer choicesC-14 dating is only appropriate for objects less than 60000 years oldA high activity corresponds to a large decay constantThe half-lives of radioactive nuclides are very similar in magnitudeThe decay constant (k) does not depend on the amount of sample

Which one of the following increases over time?Group of answer choicesthe decay ratethe number of parent atomsthe number of daughter atomsthe length of a half-life

The time it takes for half of a sample of an unstable isotope to decay to a stable form is called theGroup of answer choicesdemidose.half-life.semichron.half-morph.

Measurements of a certain isotope tell you that the decay rate decreases from 9354 decays/minute to 3185 decays/minute over a period of 3.00 days. The half-life of this isotope in units of days and to one decimal place is:

The half-life for radioactive decay of 14C is 5730 years. An archaeological artifact containing wood had only 80% of the 14C found in a living tree. Estimate the age of the sample.