Question

If bromine atom exist as two isotopes------
Br - 79(49.7%) and
Br - 81(50.3%)
calculate the average atomic mass of bromine atom?​

Answer 1

Answer:

80.006u

Explanation:

ANSWER

Average atomic mass of Br=[AtomicmassofBr

35

79

×percentage + AtomicmassofBr

35

81

×percentage]/100

=[79×49.7 + 81×50.3]/100

=80.006u

The correct answer is = 80.006u