The element with an amphoteric oxide has a notable β-emitter 198 isotope.
The element with an amphoteric oxide has a notable β-emitter 198 isotope. Usually yellow in color, this element is also found in black and red forms. The most malleable and ductile metal, it is also an excellent conductor of heat and electricity. A valuable precious metal often used in jewelry, for 10 points, name this element with atomic number 74 and symbol Au.
The element with an amphoteric oxide has a notable β-emitter 198 isotope.
{gold} [accept {Au} before the end]