Chapter
2 Atoms and Elements
2.1
Brownian Motion: Atoms Confirmed
2.2
Early Ideas About the Building Blocks of Matter
2.3
Modern Atomic Theory and the Laws That Led to It
The
Law of Conservation of Mass
The
Law of Definite Proportions
The
Law of Multiple Proportions
John
Dalton and the Atomic Theory
Chemistry
in Your: Day Atoms and Humans
2.4
The Discovery of the Electron
Cathode
Rays
Millikan's
Oil Drop Experiment: The Charge of the Electron
2.5
The Structure of the Atom
2.6
Subatomic Particles: Protons, Neutrons, and Electrons in Atoms
Elements:
Defined by Their Numbers of Protons
Isotopes:
When the Number of Neutrons Varies
Ions: Losing and Gaining
Electrons
Chemistry
in Your Day: Where Did Elements Come From?
2.7 Finding Patterns: The Periodic Law and the
Periodic Table
Modern
Periodic Table Organization
Ions
and the Periodic Table
Chemistry
and Medicine: The Elements of Life
2.8
Atomic Mass: The Average Mass of an Element's Atoms
Mass Spectrometry: Measuring the Mass of Atoms
and Molecules
Chemistry
in Your Day: Evolving Atomic Masses
2.9 Molar Mass: Counting Atoms by
Weighing Them
The Mole: A Chemist's "Dozen"
Converting
between Number of Moles and Number of Atoms
Converting
between Mass and Amount (Number of Moles)
CHAPTER
IN REVIEW: Self-Assessment Quiz
Key
Terms
Key
Concepts
Key
Equations and Relationships
Key
Learning Outcomes
EXERCISES:
Review Questions
Problems
by Topic
Cumulative
Problems
Challenge Problems
Conceptual Problems
Questions
for Group Work
Data
Interpretation and Analysis
Answers to Conceptual Connections