Some Basic Concepts Of Chemistry Question 146
Question: Three isotopes of an element have mass numbers M, (M + 1) and (M + 2). The mean atomic mass is (M + 0.5). Then which of the following ratio maybe accepted for M, (M + 1), (M + 2) respectively
Options:
A) 1 : 1 : 1
B) 4 : 1 : 1
C) 3 : 2 : 1
D) 2 : 1 : 1
Show Answer
Answer:
Correct Answer: B
Solution:
[b] Mean atomic mass $ =\frac{M\times 4+(M+1)\times 1+(M+2)\times 1}{6} $
$ =\frac{6M+3}{6}=M+0.5 $ Thus the mass ratio will be 4 : 1 :1.
