more than one kind of molecule combined such that they do not become homogeneous.
probably all of them
Neither. Helium is not a mixture at all, it is a pure substance.
Neither. Helium is not a mixture at all, it is a pure substance.
A mixture whose composition is the same in all directions.
mixture
Yes, all parts of a homogeneous mixture have the same composition and properties throughout. This means that the substances in a homogeneous mixture are evenly distributed at a molecular level, resulting in a uniform appearance and behavior throughout the mixture.
Nitrogen is not a mixture it's an element.
Not necessarily. A solution is a kind of mixture but not all mixtures are solutions.
It is not a mixture at all. H2O2 is a (pure) compound
It is a pure compound, not a mixture at all.
Yes, mud is a mixture because its a solution and all solutions are mixtures.
mechanical mixture