Uranium ores contain one radium `-226 `atom for every `2.8 xx 10^(6)` uranium `-238` atoms. Calculate the half-life of `._(88)Ra^(226)` is `1600` years `(._(88)Ra^(226)` is a decay product of `._(92)U^(238))`.

Uranium ores contain one radium -226 atom for every 2.8 xx 106 uranium -238 atoms. Calculate the half-life of ._92 U6238 given that the half-life of ._88 Ra^226 is 1600 years (._88Ra^226 is a decay product of ._92 U^238 ) :

Half life of Ra^(226) is 1620 years. Find how many atoms of radium decayed in 1 second ?

Which noble gas is obtained as a decay product of radium (Ra_(88)^(226)) ?

One gram of Ra^(226) has an activity of nearly 1 Ci the half life of Ra^(226) is a. 1500 years b. 300 years c. 1582 years d. 200 years

One gram of Ra^(226) has an activity of nearly 1 Ci the half life of Ra^(226) is a. 1500 years b. 300 years c. 1582 years d. 200 years

Half life of ""^(226)Ra is 1600 years. How many distintegrations per second occur in 1 gram of ""^(226)Ra ?

Find the activity of 1 gm of radium (._(88)Ra^(226)) Whose half life is 1620 years.

(a) On analysis a sample of uranium ore was found to contain 0.277g of ._(82)Pb^(206) and 1.667g of ._(92)U^(238) . The half life period of U^(238) is 4.51xx10^(9) year. If all the lead were assumed to have come from decay of ._(92)U^(238) , What is the age of earth? (b) An ore of ._(92)U^(238) is found to contain ._(92)U^(238) and ._(82)Pb^(206) in the weight ratio of 1: 0.1 The half-life period of ._(92)U^(238) is 4.5xx10^(9) year. Calculate the age of ore.