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.(92)U^(238) is radioactive and it emit...

`._(92)U^(238)` is radioactive and it emits `alpha` and `beta` particles to form `._(82)Pb^(206).` Calculate the number of `alpha` and `beta` particles emitted in this conversion.
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 `4.5xx 10^(9) yr.` Calculate the age of the ore.

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`8, 6, 7.098 xx 10^8 ` years
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Calculate the number of alpha - and beta -particles emitted when ._(92)U^(238) into radioactive ._(82)Pb^(206) .

(a) On analysis a sample of uranium ore was found to contian 0.277g of ._(82)Pb^(206) and 1.667g of ._(92)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. Caluculate the age of ore.

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