No. (Its an element.)
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.
Calcium chloride is an ionic compound, in which calcium and chlorine are chemically combined, forming a pure substance, and as such is homogeneous, but not like a homogeneous mixture. A homogeneous mixture is made of components that are notchemically combined.
Sodium metal is an element, not a compound. It is a pure substance made up of only sodium atoms arranged in a lattice structure, making it a homogeneous material.
First of all to correct your spelling. It is 'Concrete', not 'concrerte'. As concrete it is an heterogeneous mixture of cement, sand, gravel and water.
NO!!! Elements and compoounds exists as separate entities. Heterogeneous means a mixture of substances that are in different physical states. Compare to Homogeneous which means a mixture of substances that are in the SAME physical state. However, The element bromine(Br) is liquid at STP. The compound water(H2O) is also a liquid at STP. When mixed together to form bromin water, it is an homogeneous mixture.
heterogeneous
compound and element
compound
It is an element.
heterogeneous
Concrete is a heterogeneous mixture.
it is a heterogeneous
Vinegar is a homogeneous mixture.
Homogeneous mixture
This is a heterogeneous mixture.
Cheerios is a heterogeneous mixture.
heterogeneous