The heaviest natural element is Uranium (number 92). There are made heavier elements (I think the heaviest is ununheksium, number 116), but these atoms only live in less than a second before they split into smaller atoms.
Mercury is the heaviest element at a liquid state.
The heaviest element in the periodic table (known in March 2013) is ununoctium.
The heaviest element that is highly radioactive is Ununoctium, which has an atomic number of 118.
The information in the question 'What is the heaviest element?' should answer this. Access this by the web link below.
The heaviest element announced in February 2004 was ununpentium with the atomic number 115.
Granite.
Now californium is considered as the heaviest naturally occurring chemical element.
The heaviest element with a one letter atomic symbol is uranium (symbol: U).
This element is francium.
hydrogen
To the right!
The heaviest element in group 16 is Polonium. It has an atomic number of 84 and is a rare, highly radioactive metal.