Question

Bromine occurs in nature in the form of two isotopes 35 Br 79 and 35 Br 81. If the abundance of 35 Br 79 isotope is 49.7% and that of 35Br 81 isotope is 50.3 %, cal. average atomic mass of Bromine.
(class 9th )

Answer 1

Answer:

Solution:- (C) 80.006

Percentage of

35

79

Br=49.7%

Percentage of

35

81

Br=50.3%

Therefore,

Average atomic mass =

100

49.7×79+50.3×81

=

100

3926.3+4074.3

=

100

8000.6

=80.006

Explanation:

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