In a old rock, ratio of nuclei of uranium and lead is 1 : 1. Half life of uranium is `4.5 ×6 10^(9)` yrs. Let initially it contains only uranium nuclei. How old is the rock ?

The average mass of an atom of uranium is 3.9xx10^(-25) kg. Find the number of atom is 1 g of uranium.

The age of a rock containing lead and uranium is equal to 1.5xx10^9 years. The uranium is decaying into lead with half life equal to 4.5xx10^9 years. Find the ratio of lead to uranium present in the rock, assuming that initially no lead was present in the rock (given 2^(1/3) =1.259)

The age of a rock containing lead and uranium is equal to 1.5xx10^(9) years. The uranium is decaying into lead with half-life equal to 4.5xx10^(9) years. Find the ratio of lead to uranium present in the rock, assuming initially no lead was present in the rock. (Given : 2^(1//3)=1.259 )

The age of a rock containing lead and uranium is equal to 1.5xx10^9 years. The uranium is decaying into lead with half life equal to 4.5xx10^9 years. Find the ratio of lead to uranium present in the rock, assuming that initially no lead was present in the rock (given 2^(1/3) =1.259)

A sample of rock from moon contains equal number of atoms of uranium and lead ( t_(1//2)" for "U=4.5xx10^(9) years). The age of the rock would be :

The radium and uranium atoms in a sample of uranium mineral are in the ratio of 12.8xx10^(6) . If half life period of radium is 1620 years , the half life period of uranium will be

In a sample of pitchbende, the atomic ratio of .^(206)Pb : .^(238)U is 0.23 : 1. Calculate the age of the mineral if half life of uranium is 4.5 xx 10^(9) years. Assume that all lead has originated from uranium.