Q. Which of the following metal is the heaviest?
Answer: Osmium
Notes: The measured densities of iridium and osmium seem to indicate that osmium is slightly denser than iridium, so osmium has generally been credited with being the heaviest known element. It is the densest naturally occurring element, with a density of 22.59 g/cm³.

This question is part of 40000+ General Studies MCQ Series Course on GKToday Android app. Question Number: 89 in Chemistry-17-Important Metals in above course in App.