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How many moles of helium are produced wh...

How many moles of helium are produced when one mole of `._(92)^(238)U` disintegrates into `._(82)^(206)Pb`?

Text Solution

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Radioactive change is
`._(92)^(238)U to ._(82)^(206)Pb`
Decrease in mass = (238 - 206) = 31
Let the number of `alpha` particles emitted be x.
4x = 32
x = 8
Thus , 8 moles of helium are produced when one mole of `._(92)^(238U` disintegrates into `._(82)^(206)Pb`
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