Gold itself is an element (symbol Au, atomic number 79, in the "transitional metals" series of the Periodic Table) However, most "gold" that is available for sale is actually an alloy (homogeneous mixture) of gold with copper or some other metal. Gold is alloyed in this way because pure gold is too malleable (soft) to hold any given shape. Gold can also appear in compounds, but the compounds are not called "gold".
Concrete is a heterogeneous mixture composed of cement, sand, gravel, and water. It is not an element or a compound.
An element is a pure substance composed of only one type of atom and is homogeneous. A compound is a pure substance composed of two or more elements chemically bonded together and is homogeneous. Both elements and compounds are homogeneous in nature.
Ammonia (NH3) is a compound, not an element. It is a homogeneous mixture when dissolved in water, but a pure sample of ammonia gas is considered a compound.
Borax is a compound composed of elements such as boron, sodium, and oxygen. It is neither an element nor a mixture.
Arsenic is a chemical element with the symbol As, atomic number 33.
Heterogeneous mixture.
heterogeneous
Heterogenous
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.