The element Durkium has two isotopes, durkium-18 with a mass of 17.812 amu and durkium-22 with a mass of 21.546. Durkium is made up of 44.52% of durkium-18 and 55.48% of durkium-22. What|is the average atomic mass of durkium?

b.false that your answer

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally