CH-1138

Isotopes

Chemistry · Secondary 4 · Easy · Isotopes

A mass spectrum of element Y shows two isotopes,

^{10}Y

and

^{11}Y

. The relative abundance of

^{10}Y

is 20% and that of

^{11}Y

is 80%. What is the relative atomic mass of Y?

10.8
10.5
11.0
10.2

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