answer these allएन एलिमेंट इज अ प्योर सब्सटेंस give reason why and give
Answers
Answer:
Because it is not a mixture,
made up of same atom having same funtions
Answer:
1)Elements and compounds are pure substances because elements and compounds are always made up of same kind of particles.
Example:- pure Iron rod (iron is an element)is made up of many similar Iron atoms. ( And )
Water( a compound) is always made up of (two) Hydrogen atoms and (one) Oxygen atoms.
2) because in pure chemical substance elements are always present in definite proportion of mass and this proportion does not depend on the source and the method of preparation (Proust law)
3) in order to gain stability atoms generally lose or gain electron from other atoms and form bond. That's why atom exist in combination
4) because it is less expensive and high resistant of heat.
5) because they are highly resistance and poor conductor of electricity.
6) because it cut off oxygen supply which is important for combustion.
7) because it consists of different kinds of elements combined together physically and not chemically
8) because solvent get evaporated while solute remains in utensils.