The radioactivity isotope X with a half life of 109 years decays to Y which is stable. Samples of rocks were found to contain both the elements X and Y in the radio 1:7. What is the age of the rocks?

see full answer

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

2×109Y

3×109Y

6×109Y

7×109Y

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

NN0=11+7=18 NN0=(12)n=18 ∴n=3 t=nT=3×109years

Watch 3-min video & get full concept clarity