Question

What is the average of the mass numbers of the isotopes of an element called?

Answer 1

`"The atomic mass......."`

Explanation:

The weighted average of an individual element's isotopes is the atomic mass quoted on the Periodic Table.

The quoted atomic mass for palladium metal is `106.42*g*mol^-1`. This is the weighted average of the individual isotopes, for example for `"palladium"`:

`""^104Pd, (16.9%); ""^105Pd (29.3%); ""^106Pd (21.3%); ""^107Pd (17%); ""^108Pd (11.7%); and ""^110Pd (3.8%).`