The heaviest man made element found so for is__________?A. Promethium
B. Ununoctium
C. Francium
D. Technetium
B. Ununoctium
C. Francium
D. Technetium
Ununoctium is the heaviest element, but it is man-made. The heaviest naturally-occurring element is uranium (atomic number 92, atomic weight 238.0289).