A device used for the measurement of radioactivity is

1.
A device used for the measurement of radioactivity is

A. Mass spectrometer

B. Cyclotron

C. Nuclear reactor

D. G.M. counter

Answer» E.

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1.	A device used for the measurement of radioactivity is
A.	Mass spectrometer
B.	Cyclotron
C.	Nuclear reactor
D.	G.M. counter
Answer» E.

A device used for the measurement of radioactivity is

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