The age of most ancient geological formation is estimated by
A.
potassium - argon method
B.
carbon - 14 dating method
C.
radium - silicon method
D.
uranium - lead method
Answer :
uranium - lead method
Solution :
The age of most ancient geological objects is determined by uranium-lead method. This method is based on the radioactive properties of uranium. In this method, we assume that initially the rock did not contain any lead, we can calculate the age of the
rock by measuring the ratio of concentrations of $$_{92}{U^{238}}$$ and $$_{82}P{b^{206}}.$$
Releted MCQ Question on Physical Chemistry >> Nuclear Chemistry
Releted Question 1
A nuclide of an alkaline earth metal undergoes radioactive decay by emission of three $$\alpha $$ - particles in succession. The group of the periodic table to which the resulting daughter element would belong is
The radioactive isotope $$_{27}C{o^{60}}$$ which is used in the treatment of cancer can be made by $$(n, p)$$ reaction. For this reaction the target nucleus is
The radio isotope, tritium $$\left( {_1{H^3}} \right)$$ has a half-life of $$12.3$$ $$yr.$$ If the initial amount of tritium is $$32$$ $$mg,$$ how many milligrams of it would remain after $$49.2$$ $$yr?$$