1. Chapters 1 & 2: Intro to Chemistry & Matter and Change
What is chemistry?
the study of the composition, structure, and properties of matter and the changes it undergoes.
considers behaviors of materials as well.
Branches of Chemistry
Organic chemistry: studies compounds composed of carbon.
Inorganic chemistry: studies compounds that do not contain carbon.
Physical chemistry: studies the relationship between energy
and matter.
Analytical chemistry: identifies the components and make-up of
materials.
Biochemistry: studies the substances and processes involved in
living things.
Theoretical chemistry: utilizes computers to design and predict
the properties of new substances.

2. Scientific method
Most scientific advances result from carefully planned investigation.
Scientific method
Observing
collecting data
measuring
Formulating Hypotheses
analyzing data
predicting
Testing
experimenting
collecting data
If data does
not support
hypothesis
Theorizing
constructing models
predicting
Publish Results
communicating

3. Scientific method Observing
Making measurements and/or collecting data.
Data can be either qualitative (descriptive/words) or quantitative (numerical).
Formulating Hypotheses
A testable statement that serves as the basis for making predictions.
Testing Hypotheses
Experiments are performed that provide data to support or refute a hypothesis.
Theorizing
When predictions of the hypothesis are successful, scientists use models (explanations of how phenomena occur and how events are related).
Theories: a generalization that explains body of facts and phenomena.

4. solid: matter with a definite shape and definite volume.
Change of State
boiling
melting
Solid
Liquid
Gas
freezing
Condensation
solid: matter with a definite shape and definite volume.
liquid: matter with a definite volume but an indefinite shape.
gas: matter without a definite shape or volume.
Solid,
Liquid,
Gas

5. Are you ready for some chem Lab???? Polymer Laboratory Exercise
Oobleck & Glurch

6. Matter and Its Properties
all matter takes up space (has volume) and has mass.
mass: a measure of the amount of matter.
Objects that have a large amount of matter will have a large mass,
and objects with a small amount of matter will have a small mass.
Basic Building Blocks of Matter
all matter is made up of atoms and/or molecules.
atom: the smallest unit of an element that maintains the
properties of that element.
element: a pure substance made of only one kind of atom.
molecule: a substance that is comprised of two or more
elements that are chemically bonded.
compound: a substance that is comprised of two or more
different elements that are chemically bonded.

7. Properties and Changes in Matter What is a property?
a characteristic that defines an entire group of substances.
Extensive property: depend on the amount of matter present.
ex: volume, mass, energy
Intensive property: do not depend on the amount of matter present.
ex: melting point (freezing point), boiling point, density,
conductivity
Substances can also be further classified: physical properties and chemical properties.
Physical properties: a characteristic that can be observed or measured without changing the identity of the substance.
ex: melting point, boiling point
A change in a substance that does not involve a change in the identity of a substance is called a physical change.
ex: grinding, cutting, changes of state (melting & boiling)
Changes in
Matter Video

8. Chemical Properties and Chemical Changes
2. chemical properties: pertains to a substance’s ability to undergo changes
that transform it into different substances.
ex: combustibility, rusting, tarnishing
chemical change: a change in which one or more substances are
converted into different substances.
“chemical reaction”
Gummi
Bear
Rxn
REACTANTS PRODUCTS

9. Classification of Matter
all matter can be classified as either a pure substance or a mixture.
pure substances  elements & compounds
mixtures  a blend of two or more kinds of matter, each of which retains its own identity and properties.
Homogeneous mixtures: uniform in composition.
ex: salt water solution
Heterogeneous mixtures: not uniform in composition.
ex: muddy water
Mixtures can be separated physically.
Filtration
Decanting (“pouring off”)
Paper chromatography
Centrifugation
Pure substances differ from mixtures in the following ways:
Every sample of a pure substance has exactly the same characteristic properties.
Every sample of a given pure substance has exactly the same
composition.
Separating
Mixture
Separating
Ink

10. ELEMENTS
Introduction to the Periodic Table
the elements are organized based on similar chemical properties.
vertical columns of the periodic table are called groups.
horizontal rows of elements are called periods.
Types of Elements
Metals: have luster (shiny) and are good conductors
of heat and electricity.
Most metals are solids at room temp.
Metals are malleable: they are capable of being
hammered or rolled into thin sheets.
Metals are ductile: they can be drawn into a fine
wire. (due to the high tensile strength of metals)

11. 2. Nonmetals: elements that are poor conductors of heat and electricity.
many nonmetals are gases at room temperature (some are solids).
solid nonmetals are brittle.
rarely have metallic luster (dull appearance).
usually do not react with acids.
3. Metalloids: elements that have some characteristics of metals and some characteristics of nonmetals.

12. According to Element Type
The Periodic Table
According to Element Type