1 / 18

Properties of Matter

Properties of Matter. Chapter 2. ELEMENTS Cannot be broken down into simpler substances. Can be found as solids, liquids, or gases Represented by symbols. COMPOUNDS 2 more elements chemically joined together Can be broken down through chemical means Represented by a formula.

otylia
Télécharger la présentation

Properties of Matter

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Properties of Matter Chapter 2

  2. ELEMENTS Cannot be broken down into simpler substances. Can be found as solids, liquids, or gases Represented by symbols COMPOUNDS 2 more elements chemically joined together Can be broken down through chemical means Represented by a formula Pure Substances

  3. Homogenous Appear the same throughout. Well-mixed Examples: Heterogeneous Can see different parts Not very well mixed Examples: Mixtures

  4. solutions • The best mixed mixture. • One substance is dissolved in another. • Cannot be separated by filtering • Particles are too small to be seen

  5. Suspensions A heterogeneous mixture that will separate over time The particles in a suspension are larger than the particles dissolved in a solution Cloudy appearance Examples: muddy water, oil & vinegar salad dressing

  6. Colloids • Intermediate sized particles. Smaller than suspension but larger than solution. • Particles are permanently suspended • Will scatter light

  7. Physical Properties • A characteristic of matter that can be directly observed without changing the identity of the substance

  8. Viscosity • The resistance of flow in a liquid • How “thick” or “thin” a liquid is • Examples of substance that have high viscosity:

  9. Conductivity • The ability to conduct heat or an electric current • High conductivity: metals • Low conductivity: wood, rubber

  10. MALLEABLE Ability to be hammered into a thin sheet. Example: DUCTILE Ability to be drawn into a thin wire. Example: Malleability vs ductility

  11. Melting and Boiling Points • Very useful in determining unknown substances.

  12. Density • The amount of mass per unit volume • D = M/V

  13. Separating Mixtures • Filtration = using a strainer or filter to separate on the basis of size of the particles.

  14. Distillation • A means of separating substances in a mixture or solution by differences in their boiling points.

  15. Chemical properties • Flammability : a materials ability to burn in the presence of oxygen • Reactivity : how easily a chemical reacts with other substances. • Health : degree of danger to humans

  16. Signs of a chemical reaction • Change in color • Production of a gas • Formation of a precipitate

  17. Pages 63-64 1-10,12,15,26,27 Page 65 1-6 Assignment:

More Related