Chapter 2 Matter

Chemical Change: – Produce gas – Produce heat/light – Produce precipitate Physical Properties – Density – BP – FP

Matter – Has mass takes up space H 2 O  H + O CH 12 O 6 – How many H atoms? – How many total atoms?

Chemistry: – Science of what matter is made of and how it changes Most abundant element in the Earth – Iron Most abundant element in the human body – Oxygen

4 phases of matter – Solid Definite shape and definite volume – Liquid No definite shape, definite volume – Gas No definite shape, no definite volume – Plasma High energy

Density – D = m / v Homogenous mixture – Same through out. Ex: salt + water Heterogenous mixture – Different through out. Ex: dirt and water

Element: – Substance that cannot be broken down into a simpler substance