Final answer:
Au is the symbol for the element gold in the periodic table of elements.
Step-by-step explanation:
The symbol Au stands for the element gold. This is an established fact in the periodic table of elements where each element is represented by a unique one or two-letter symbol. The symbols for the elements are universal and are used across various scientific disciplines. For example, aluminum is represented as Al, while silver is denoted as Ag. Gold, with the symbol Au, is a precious metal with various applications in jewelry, electronics, and even in medicine.