Atomic structure

A sample of the lanthanide metal europium consists of only two isotopes, $151Eu^{151}\text{Eu}$ and $153Eu^{153}\text{Eu}$ .

The relative atomic mass ( $A_r$ ) of this sample of europium is 151.91.

Determine the percentage abundance of each isotope in this sample. Give your answers to 1 decimal place.

[2]

A sample of the lanthanide metal europium consists of only two isotopes, $151Eu^{151}\text{Eu}$ and $153Eu^{153}\text{Eu}$ .

The relative atomic mass ( $A_r$ ) of this sample of europium is 151.91.

Determine the percentage abundance of each isotope in this sample. Give your answers to 1 decimal place.

[2]

Atomic structure Questions