Why is blood a mixture and graphite an element? Mention any one reason for each.

(N/A) Blood is considered a mixture because its components (such as plasma,red blood cells,white blood cells,and platelets) can be separated by physical methods like centrifugation,and their composition varies from person to person.
Graphite is considered an element because it is composed of only one kind of atom (carbon atoms) and it cannot be broken down into simpler substances by chemical or physical means.