NEET Physics Nuclei Questions Solved

PMT - 2003
A sample of radioactive element has a mass of 10 gm at an instant t-0. The approximate mass of this element in the sample after two mean lives in (A) 3.70 gm (C) 1.35 gm (B) 6.30 gm (D) 2.50 grm (CBSE PMTIPDT 2003)

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