Physics by Greg Curran

Author:Greg Curran [Curran, Greg]
Language: eng
Format: epub
Tags: General, Science, Study Aids, Physics, Study Guides
ISBN: 9781601632098
Publisher: Career Press
Published: 2012-03-15T06:51:20+00:00

Figure 5.1

Thinking back to your study of chemistry, you should recall two types of charged subatomic particles, the proton and the electron, with a positive charge and a negative charge, respectively. Atoms can gain or lose electrons to become ions, or charged atoms. A negative ion is an atom that has gained one or more extra electrons. A positive ion is an atom that has lost one or more electrons.

When we say that an atom, or any object, has lost an electron, we don’t mean that it was destroyed. Electrons travel from atom to atom, or object to object, but they aren’t created or destroyed in the process of normal charging. In most of the cases that we will discuss in this chapter, charging is accomplished by getting some electrons to leave one object and go to another, leaving the first object with a deficiency of electrons and a positive charge, and the second object with an excess of electrons and a negative charge.

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