Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
0 votes

Three isotopes of an element have mass numbers m,m+1 and m+2.If the mean mass number is ( m +0.5) then which of the following ratios may be accepted for m,(m+1) and (m+2) in that order

$(a)\;1 : 1: 1\qquad(b)\;4 : 1: 1\qquad(c)\;3 : 2 : 1\qquad(d)\;2 : 1 : 1$

Can you answer this question?

1 Answer

0 votes
Average mass =$(m+0.5)=\large\frac{m\times 4+(m+1)\times 1+(m+2)\times 1}{6}$
$\Rightarrow \large\frac{6m+3}{6}$
Hence (b) is the correct answer.
answered Jan 16, 2014 by sreemathi.v

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App