compound:is a substance which formed by chemical combination of two or more element bonded together in a specific proportion.
compound is a unification of various element in which atom of each element combine together by chemical bond which cannot easly split.There are different bonds formed between atoms including the following;
Covalent bond; it is a chemical bond formed by sharing of electron between atom.It also known as a molecular bond
Ionic bond; it is formed by transfering of valence electrons from one atom to another atom.
Metalic bond ; it is formed as a result of electrostatic force of attraction between metalic ions and conduction electron.
example of compound are ;carbondioxide (CO2)which contain carbon and oxygen elements, water (H2O) which contain hydrogen and oxygen elements
Mixture:is a substance formed by physical combining of two or more elements.
The combination can be capable of being separated back to normal through physical means.
Types of mixtures
Homogeneous mixture:is a mixture in which ingredients cannot being distinguished from one another.example mixture of salt and water and blood plasma and air.
picture of homogeneous mixture
2.Heterogeneous mixture:is a mixture inj which ingredients are of different shapes, size or state anf can easly distinguished through simple observation.Example mixture between oil and water,mixture of sand and sugar .
picture show heterogeneous mixture of water and oil
Difference between compound and mixtures.
COMPOUND
MIXTURE
Formed by chemical combination between two or more elements
Formed by physical combination between two or more elements
elements cannot be separated by physical means.
Elements can be separated by physical means.
There is reaction , energy change is always present in preparation of compound,I.e evolution of heat.
No reaction ,no energy change evolved during preparation of compound
