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CHEMISTRY
Atoms and
8 8 Periodic
Properties
This is a picture of pure zinc, one of the 89 naturally occurring
elements found on Earth.
CORE CONCEPT
Different fields of study contributed to the development of a model of the atom.
OUTLINE
8.1 Atomic Structure Discovered
Discovery of the Electron Discovery of the Electron The Nucleus
The electron was discovered from The Nucleus The nucleus and proton were
experiments with electricity. 8.2 The Bohr Model
The Quantum Concept discovered from experiments
Atomic Spectra with radioactivity.
Bohr’s Theory
Bohr's Theory 8.3 Quantum Mechanics
Experiments with light and line Matter Waves
spectra and the application of Wave Mechanics The Quantum Mechanics Model
the quantum concept led to the The Quantum Mechanics Model Application of the wave
Bohr model of the atom. Science and Society: Atomic Research properties of electrons led to the
8.4 Electron Configuration quantum mechanics model of
8.5 The Periodic Table
8.6 Metals, Nonmetals, and Semiconductors the atom.
The Periodic Table A Closer Look: The Rare Earths
The arrangement of elements in People Behind the Science: Dmitri
the periodic table has meaning Ivanovich Mendeleyev
about atomic structure and
chemical behavior.
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