naturally occurring argon consists of three isotopes, 36Ar, 38Ar, 40Ar, in the ratio of 4.86: 1: 1423 i) calculate percentage abundance of each isotope ii) calculate the relative atomic mass of argon

naturally occurring argon consists of three isotopes, 36Ar, 38Ar, 40Ar, in the ratio of 4.86: 1: 1423 i) calculate percentage abundance of each isotope ii) calculate the relative atomic mass of argon