CHEMISTRY & BIOLOGY RESOURCES FOR SECONDARY

Matter:Anything that exhibits inertia is called matter. The quantity of matter is its mass. Classification of Matter:-Based on chemical composition of various substances. 📍Elements:➖It is the simplest form of the matter.➖Smallest unit of an element is known as atom.➖Total number of the known elements is 118 out of which 98 elements occur naturally and 20 […]