Is ammonia an element a compound a homogeneous mixture or a heterogeneous mixture?

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.

Is borax a element compound homogeneous mixture or heterogeneous mixture?

Borax is a compound composed of elements such as boron, sodium, and oxygen. It is neither an element nor a mixture.

Is arsenic a element a compound a homogeneous mixture or a heterogenous mixture?

Arsenic is a chemical element with the symbol As, atomic number 33.

Is concrerte an element compound homogeneous heterogeneous?

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.

Is an element and a compound heterogeneous?

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.