Matter in Our Surroundings

Matter in Our Surroundings Matter has mass and takes up space, Solid, liquid, gas in every place. Solid fixed and strong and tight, Liquid flows and gas moves light. Heating gives particles energy free, Change of state is easy to see. Is Matter Around Us Pure Pure substance has only one kind, Mixtures have different combined. Solution clear, no settling down, Suspension particles move around. Colloid stays in between the scene, Tyndall effect makes it seen. Atoms and Molecules Atoms tiny, cannot see, Join as molecules naturally. Mass in reaction stays the same, Law of conservation is its name. Mole concept helps to count amount, Mass calculation becomes exact. Structure of Atom Atom has nucleus at centre place, Protons and neutrons in that space. Electrons move in shells around, Energy levels fixed and bound. Atomic number is proton count, Mass number total amount.