👉 The term "yttrium" is typically used in atomic physics and chemistry to refer to a rare earth metal that is known for its unique properties. It is composed of two atoms, one of which is oxygen (O). This element's chemical symbol is Yt, and it has the following atomic number 40. In the context of yttrium, there are several specific properties that make it valuable: 1. Optical property: The color of yttrium varies depending on its crystal