Question

11. Calculate the atomic mass of element Ck using the following information. Ck-167 has an abundance of 45.2%, Ck-163 has an abundance of 12.7%, and Ck-165 has an abundance of 42.1%. PESCO 000

Answer 1

Anwen of © We have Element Ck. To calculate the atomic Mass this Element. We have to take the Mass of isotope Multiply of with its relative and abundance percentage decimal then add them together for als the three isotopes and expresed o decimal Given Data - Isotope a bundance Atonic Mass. Camu) or gloo) CK-163 12.7 % 163 CK-165 42.1% 165 CK-167 45.2% 167 since No exact atomic masses are ed so . Om wing - provided from the provided the atomic Masses elements for element 163 Change percentage to by dividing by loo decimal CK-163 = 1217 0.127 163 g 0:127 = 20,70) amu 0

for Element 165 Ck-165 0.421 X 165 69.465 amu for Element 167 CK-167 0,452 X 167 75.484 amu 3 How and them together Average Atomic Mass = 20.70l + 69.465 + 750484 amu 165065 amu ou mol So Average atomic mass g 1651 65 amu glmed Ck is