Introduction to ChemistryMatter

What is Chemistry?In your own words, please write down how you would define the following words:

Biology

Physics

Chemistry

What is Chemistry?

Biology

Physics

Chemistry

The study of living organisms

The study of forces & motion

The study of matter and its reactions and properties

Matter

Matter

Elements

Type of matter that cannot be broken down into simpler, stable substances and is made of only one type of atom

Compounds

A pure substance that contains two or more elements whose atoms are chemically bonded

Compounds

Fixed compositions A given compound contains the same elements

in the same percent by mass

Compounds

The properties of a compound are VERY DIFFERENT from the properties of the elements they contain

Ex.) Sodium Chloride (NaCl) vs. Sodium & Chlorine

Sodium: http://www.youtube.com/watch?v=RAFcZo8dTcU

http://www.youtube.com/watch?v=92Mfric7JUc

Electrolysis

Mixtures

A blend of two or more kinds of matter, each of which retains its own identity and properties

Homogeneous

Heterogeneous

Homogeneous MixturesComposition is the same throughout the

mixtureExamples: salt water, soda water, brass

A.k.a. a solutionSolute in a solvent (salt dissolved in water)

Heterogeneous Mixtures

Non-uniform; composition varies throughout the mixture

Separating Mixtures

Filtration

Separating MixturesDistillation

Separating Mixtures

Chromatography