chapter21-part1

Chapter21-part1 - Electric charge Electric charge is a fundamental property of matter same as mass Mass is associated to gravitational forces

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1 Electric charge Electric charge is a fundamental property of matter, same as mass. Mass is associated to gravitational forces, charge is associated to “electromagnetic” forces. Charge exists in two “flavors”: + - “positive” “negative” How is the atom arranged? Why is it easiest to move electrons? •Electrons arrange around the nucleus in “shells”. •Inner electrons are tightly bound to the nucleus. •Electrons in outer shells are less bound to the nucleus and easy to remove. •New electrons added to the atoms, will sit in the outer shell as well.
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Lithium as a cation, an anion, and a neutral atom • Let’s study the subatomic arrangement of lithium with all charges balanced and the way only electrons move to make the atom an ion (+ or -). Charge is “quantized” Charge can only exist in “packets” formed by an integer number of “elementary or fundamental charges”, the charge of the electron (or proton) C 10 60217653 . 1 19 - × = e This number is so small, that the charge can
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This note was uploaded on 12/08/2010 for the course PHYSC 1220 taught by Professor Feiguin during the Fall '10 term at Wyoming.

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Chapter21-part1 - Electric charge Electric charge is a fundamental property of matter same as mass Mass is associated to gravitational forces

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