Respuesta :

Mixture= combination of two or more different chemical compounds or elemental substances
Compound= is composted of at least two different types of elements
element= something found on a periodic table
Pure substance= a material that has a constant compisition

mixture = when two or more substances combine without making a new substance.

compound = elements that are bonded together chemically

element = the simplest form of matter that cannot be broken down

pure substance = a substance made up of one compound

basically the differences are their definitions :D