Question

29. Bromine has two naturally occuring isotopes, Br-79 and
Br-81. The atomic mass and per cent natural abundance of
Br-79 are 78.9183 u and 50.54%. What is the atomic mass
of the second isotope, Br-81? (Br = 79.90)
(a) 81.50
(b80.90
(c) 49.46
(d) 79.05​

Answer 1

81.50

Explanation:

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