Question

Element X consist of two isotopes with masses of 62.9 and 64.9. The relative atomic mass of the element is 63.6. What is th

e percentage abundance of the lighter isotope? Show your working out.

Answer 1

it is 50%

Step-by-step explanation:

62.9x50=3145

64.9x50=3245

3245+3145=6390

6390/100=63.9