Uranium, U is.
Gold (Au) is heavier than silver (Ag). Gold has a higher atomic number and a greater atomic mass compared to silver.
Note that a higher atomic mass does not necessarily imply a higher density (it does tend to work that way, but there are lots of counterexamples, and for example both osmium and iridium are considerably denser than the much heavier... in terms of atomic mass... uranium). So depending on what you mean by "heavy", the answer might be slightly different.
The element symbol for gold is Au.
The element represented by Au is gold.
The element sign for gold is Au.
_The 79th element on the periodic table is Gold, Au
The element with the symbol Au is gold.
gold I believe you are talking about the element Gold. It comes from the Latin name of gold which is aurum.
Au is the atomic symbol for the element Gold. Au is technically 100% gold, because Au only stands for gold, and no other element.
Au is the symbol for gold, from the Latin aurum.
The only element which has the symbol Au is gold.
The chemical formula for the element gold is Au.