Nuclear Physics and RadioactivityMedium
Question
The atomic weight of boron is 10.81 g/mole and it has two isotopes 105B and 115B. The ratio (by number) of 105B : 115B in nature would be :
Options
A.19 : 81
B.10 : 11
C.15 : 16
D.81 : 19
Solution
Let 105B and 115B be in the ratio m:n .
Average atomic weight
10.81 =
⇒
Average atomic weight
10.81 =
⇒
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