Verified Solution • 2025–26 Session moderate

QAIPM-2002-Ph-2815: NEET 2002 Physics - Class 12 AIPM-2002-Ph-2815 Solution: A sample of radioactive element containing \(4 10^{16}\) active …

A sample of radioactive element containing 4×10164\times10^{16} active nuclei. Half life of element is 10 days, then number of decayed nuclei after 30 days

Multiple Choice Options

  • A 0.5×10160.5\times10^{16}
  • B 2×10162\times10^{16}
  • C 3.5×10163.5\times10^{16}
  • D 1×10161\times10^{16}

Step-by-Step Verified Solution

N = 4 _ 10 16 ( 1 2 ) 30 10 = 1 2 _ 10 16 _ Atoms decayed = 4 _ 10 16 - 1 2 _ 10 16 = 3.5 _ 10 16

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