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Starting from radium, the radioactive d...

Starting from radium, the radioactive disintegration process terminates when the following is obtained a)radon b)lead c)uranium d)thorium

A

lead

B

radon

C

radium A

D

radium B

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The correct Answer is:
a
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  7. A sample of .(19)^(40)K contains invariably .(18)^(40)Ar. This is beca...

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