^238_92U atom disintegrates to ^214_84Po with a half life of 4.5 \times 10^9 years by emitting six alpha particles and n electrons. Here n is

KVPY SA Exam 2012 Question Paper

Question : 28 of 80

Marks: +1, -0

^238_92U

atom disintegrates to

^214_84Po

with a half life of

4.5 × 10^9

years by emitting six alpha particles and n electrons. Here n is

Solution:

^238_92U→ {^214_84}Po+6α+ne^{-}

92 = 84 + 12 – n
n = 4

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