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General Chemistry Principles, Patterns, and Applications, 2011

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Bohr’s model <strong>and</strong> the current model are described in Chapter 6 "The Structure of Atoms".<br />

Summary<br />

Atoms, the smallest particles of an element that exhibit the properties of that element, consist of<br />

negatively charged electrons around a central nucleuscomposed of more massive positively<br />

charged protons <strong>and</strong> electrically neutralneutrons. Radioactivity is the emission of energetic particles<br />

<strong>and</strong> rays (radiation) by some substances. Three important kinds of radiation are α particles (helium<br />

nuclei), β particles (electrons traveling at high speed), <strong>and</strong> γ rays (similar to x-rays but higher in energy).<br />

K E Y T A K E A W A Y<br />

<br />

The atom consists of discrete particles that govern its chemical <strong>and</strong> physical behavior.<br />

Saylor URL: http://www.saylor.org/books<br />

Saylor.org<br />

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