The heaviest naturally occurring element is

http://www.google.com/#q=heaviest+naturally+occurring+element+on+earth

The heaviest naturally occurring element is uranium. To determine this, we can look at the periodic table of elements. Uranium has the atomic number 92, which means it has 92 protons in its nucleus.

In general, as we move from left to right across the periodic table, the elements become heavier because the atomic number increases. Elements with higher atomic numbers tend to have more protons, which contributes to their heavier mass.

Therefore, by examining the periodic table and comparing the atomic numbers of different elements, we can determine that uranium, with an atomic number of 92, is the heaviest naturally occurring element.