ेडियोएक्टिवताशब्द सर्वप् – McqOptions

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1.	ेडियोएक्टिवताशब्द सर्वप्रथम किसने उपयोग मे लिया ?
A.	आरेनियस
B.	वाटसन
C.	जोसफ
D.	हैनरी बैकुरल
Answer» E.

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