Gold is an element. It is classified as a chemical element with the symbol Au and atomic number 79, meaning it consists of only one type of atom. Gold is not a compound or a mixture, as it does not contain different substances chemically combined or physically mixed together.
Heterogeneous mixture.
Heterogenous
heterogeneous
Homogeneous mixture
Milk is a homogeneous mixture.
Homogeneous mixture
homogeneous mixture
Homogeneous mixture
It is an element.
Chocolate milk is a heterogeneous mixture.
it's a compound
Aluminum is an element.