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The mass numbers of three isotopes of an...

The mass numbers of three isotopes of an element are 10,12,14 units. Their percentage abundance is 80,15 and 5 respectively. What is tha tomic weight of the element?

A

0.25

B

11.25

C

12.25

D

13.25

Text Solution

Verified by Experts

The correct Answer is:
B
`"Avg. at. wt " = (sum % "abundance" xx "Atomic weight")/("Total ratio")`
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