Chapter 1 Flashcards
Compound
Two different elements joined together
H2O
Physical change
Affect state or form
Liquid->Gas
Electrical conduction
Chemical Change
Combing or Decomposing of substances
Combustion of Hydrogen
Intensive Properties
Do not depend on sample size
Boiling Point of Water
Melting Point
Extensive Properties
Depend on sample size
1L doesn’t equal 1mL of water
Accuracy
How close measurements are to the “correct” value
Precision
How closely data agrees with each other
Composition
Kinds of atoms an element contains
Structure
Arrangement of atoms in an element
Mixture
Combinations of two or more substances in which each retains its own chemical identity
Physical Properties
Measured without changing identity Color Odor Density Melting point Boiling point Hardness
Chemical Properties
The way a substance may change to form other substances
Dimensional Analysis
Given Unit X desired unit/given unit=desired unit
