when substances are combined it is sometimes called a mixture.
a compound
when two elements combine, its called a compound. when when two things like water and koolaid mix combine, its a mixture!
a synthesis reaction
This is called a compound.
Its a chemical change, and the simplest is when two atoms combine to from a compound. When there is a single oxygen atom, it is called ozone, then two combine in an ionic bond, they are an oxygen molecule.
mixture
These substances are called reactants.
chemistry
synthesis reaction
synthesis reaction
Synthesis.
i have no idea :)