Different frequencies in wavelengths are radiation, microwaves, radio waves, gamma rays. An ion is the charge an atom has, either cations (when an atom loses an electron and becomes positively charged) or anions (when an atom gains an electron becoming negatively charged).
Gold is a metal, but it can form the Au3+ ion.
Au3+
a gold ion
The pure gold reacts with Aqua regia (HNO3+3HCl) and forms Au3+ ion
The ion Au3+ is called the auric ion.
Au3+
Au3+
positive
Gold is a metal element. Atomic mass of it is 197.
Au^(3+)
Yes, gold most often forms the Au3+ ion.
No, gold is an element. It belongs to the d group. It is a metal element.