cse • paper_2 • nuclear_particlecse-1986-subject-07-001
Radioactive activity — UPSC CSE 1986 Physics PYQ
Buy PYQ Solution Manual →The number of alpha particles emitted per gm of radium each second is 3.71 \times 10^{10}. Atomic weight of radium is 226. Calculate its half-life in years.
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