In order to investigate the age of a mineral sample believed to be millions of years old,which would be the best choice of radioactive isotope to measure?
A) (59Fe (t1/2 = 45.1 d) )
B) (12C (t1/2 = 5.72 ×103 yr) )
C) (53Mn (t1/2 = 3.7 ×106 yr) )
D) (40K (t1/2 = 1.2 ×109 yr) )
E) (238U (t1/2 = 4.51 ×109 yr) )
Correct Answer:
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