An element has two naturally occurring isotopes, as described in the following table. Calculate the relative atomic mass and identify the element.
$\begin{array}{lcc}
\hline \text { Isotope } & \text { Natural abundance (\%) } & \text { Relative atomic mass } \
\hline 1 & 69.17 & 62.929 \
2 & 30.83 & 64.928 \
\hline
\end{array}$

Question

Quizplus · Accepted Answer

The relative atomic mass is calculated as (69.17% * 62.929) + (30.83% * 64.928) = 63.54. The element with this atomic mass is copper.

An Element Has Two Naturally Occurring Isotopes, as Described in the Following