Question

two isotopes of potassium are 39 K 19 AND 40K19. THE AVERAGE ATOMIC WEIGHT OF K IS 39.1 . FIND OUT THE PERCENTAGE OCCURANCE OF ISOTOPE

Answer 1

Answer:

given

1st isotopes of potassium=39K

2nd isotopes=40K

average atomic weight=39.1

percentage of isotope=39.1/39+40×100

=39100/79×10

49.4936%

=49%