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If bromine atom is available in the form of, say, two isotopes 79 35Br(49.7%) and 81 35Br(50.3%), calculate the average atomic mass of bromine atom. - CBSE Class 9 - Science

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Question

If bromine atom is available in the form of, say, two isotopes `""_35^79Br (49.7%)" and """_35^81Br (50.3%)`, calculate the average atomic mass of bromine atom.

Solution

It is given that two isotopes of bromine are `""_35^79Br (49.7%)" and """_35^81Br (50.3%)`

Then, the average atomic mass of bromine atom is given by:-

`79xx(49.7/100)+81xx(50.3/100)`

`=3926.3/100+4074.3/100`

`=8000.6/100`

= 80.006 u

= 80 u (approx)

  Is there an error in this question or solution?

APPEARS IN

 NCERT Solution for Science Textbook for Class 9 (2018 to Current)
Chapter 4: Structure of the Atom
Q: 10 | Page no. 55
Solution If bromine atom is available in the form of, say, two isotopes 79 35Br(49.7%) and 81 35Br(50.3%), calculate the average atomic mass of bromine atom. Concept: Structure of Atom Introduction.
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