Properties of Matter Physical Properties Chemical Properties Physical

Properties of Matter

• Physical Properties • Chemical Properties

Physical Properties • • • Mass Color Melting Point Boiling Point Density State (at normal conditions)

States of Matter Density • • • Plasma Gas Liquid Solid Neutronium Black Hole Energy/Temperature

Transitions (a physical Change) Gas Condensation Vaporization Boil Liquid Solidify Freeze Melt Solid

• Physical Change

Mixtures Heterogeneous Homogeneous Solution Mixtures can vary in composition / amount

Separation of Mixtures • Using Physical Methods / Physical Properties • • Salt and pepper Salt and sand Water and salt Water and Alcohol – distillation

Elements and Compounds Matter Substance Mixture of Substances (Definite Composition) (Variable Composition) Element Compound Homogeneous mixture Heterogeneous mixture (solution, uniform) (nonuniform, layers, “phases”)

Elements and Compounds • So Whats the difference between Elements and Compounds – Made of 2 or more Elements - Can be chemically separated Elements – only one type of substance

• Is it important? ? ? • Well, getting some definitions straight is good… • And, it lets you know what kinds of things might go on… • Like, what happens when you had Sodium and Chlorine – or Sodium to Water?

Chemical Reaction • OK – what happens when you put Na with Cl 2? 2 Na + Cl 2 -> 2 Na. Cl Reactants -> Products Cool, a poison plus a poison makes salt – not a poison!

How do you know it’s a Chemical Reaction? • Energy is Absorbed (cools) or Released (gives off heat) • Light! (sound) • Color change • Gas formed, Solid formed (precipitate) • Not easily reversible • (are there exceptions to these… well, yes)

Conservation of Mass Conservation of Energy • In a chemical reaction* – matter cannot be created nor destroyed • In a chemical reaction* - Energy cannot be created nor destroyed

Hold on – what about atomic bombs • OK – you got me – the REAL answer is • Matter and energy can neither be created nor destroyed – it can only change forms.

Baker - @ Bikini - RMI

Disclaimer Aloha I put together these power points for use in my science classes. You may use them in your classes. Some images are public domain, some are used under the fair-use provisions of the copyright law, some are mine. Copyright is retained by the owners! Ted Brattstrom