Textbook Notes (270,000)
US (100,000)
LSU (20,000)
CHEM (800)
CHEM 1201 (300)
All (200)
Chapter 1

CHEM 1201 Chapter Notes - Chapter 1: Chemical Compound, Intensive And Extensive Properties, Trailing Zero


Department
Chemistry
Course Code
CHEM 1201
Professor
All
Chapter
1

This preview shows page 1. to view the full 4 pages of the document.
Chemistry Chapter 1 Notes
January 18-23,2012
What is chemistry?
oChemistry is the study of the composition structure and properties of matter and
its transformations.
Atoms are the building blocks of chemistry.
Elements are atoms with different numbers of protons.
Molecules are two or more atoms arranged specifically.
A chemical compound always has the same elemental composition.
Law of Definite Properties- A chemical compound always has the same proportion of
elements by mass
Law of Constant Composition- A Chemical compound always has the same elemental
composition
States of matter: solid, liquid, gas, plasma
Properties of Matter
oPhysical-
Observed without changing chemical identity
Melting, boiling, density, volume
oChemical-
Observed only when a substance changes to another substance
Flammability, reaction with acid, corrosion
Intensive Properties: Do not depend on the amount of sample being examined and are
particularly useful in chemistry because many intensive properties can be used to
identify substances.
oEx: Temperature and melting point
Extensive Properties: depend on the amount of sample. Relating to the amount of the
substance
oEx: Mass and volume
You're Reading a Preview

Unlock to view full version