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A. Promethium
B. Ununoctium
C. Francium
D. Technetium

Submitted by: Malik Asghar Hussain

Ununoctium is the heaviest element, but it is man-made. The heaviest naturally-occurring element is uranium (atomic number 92, atomic weight 238.0289).

Correct Answer: Ununoctium

Last Updated: December 12, 2019