A chemical reaction.
This kind of reaction is called "decomposition".
compound or mixture
That's called a compound.That's called a compound.That's called a compound.That's called a compound.
an ionic compound
a compound
A chemical reaction is a kind of combining that results in a new substance.
The reaction would be a combination reaction. This type of reaction is also sometimes referred to at a synthesis reaction.
A "decomposition" or "disproportionation" reaction.
Potassium is not an organic compound, it is a pure substance, an element.
A chemical reaction is a change in which one kind of matter changes into a different kind of matter with different properties. Reactant is a substance used in a chemical reaction and a product is a substance made in a chemical reaction. Hope this is helpful! ;)
A synthesis reaction.
A mixture