The element Gd has an average atomic mass of 157.25 . Use the data given below...

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Question

The element Gd has an average atomic mass of 157.25 . Use the data given below to determine the missing quantities.

Isotope Mass (amu) Abundance(%)

I 151.9195 0.200

II 153.9207 2.15

III 154.9226 14.73

IV 155.9221 20.47

V 156.9339 15.68

VI 157.9241 24.87

VII ? ?

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Answer 1

Answer #1

Answer 2

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