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Q.

Which element disintegrates to give two noble gases

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a

Rn

b

He

c

Th

d

Ra

answer is A.

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Detailed Solution

Ra' disintegrates to give two noble gases.

Radium undergoes radioactive decay, looses 2 electron and 4 proton to give Rn and He.

 Ra 88226He 24 + Rn 86222

 

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