Static Electricity


A) Electricity of the Atom

Atoms are
 ordinarily neutral


#p = #e-


n has no charge


p has +1 charge


e- has -1 charge



Charge electron

-1.6 x 10-19 Coulombs






1. Atoms become charged by gaining or losing ...





#24 - 3 Big Rules of Electrostatics

Opposites Attract

Likes Repel


Only Electrons Move

(Protons move, but don't leave nucleus)



Charge plates can deflect an electron





Mg+2   F -1

Mg atom
Lost 2 electrons


F  atom
gained 1 electron

20 p , 18 e-
What's the charge?



+ 2





Why are protons never lost or gained?


Protons are held in the nucleus by the strongest forces in the universe




a) Ion: electrically charged particle:



Charge is unbalanced




 negative charge




#e > #p






positive charge



#p > #e







"What is the

bottom prong of

 a plug called?"


"The bottom prong of
a plug called the ground.
It discharges any excess
charge that may develop
in an electrical device"


#25 - When grounded:



Negatively charged objects ...



... lose electrons

and become neutral.



Positively charged object ...



... gain electrons

and to become neutral.



Conserv. Charge


Tony Mangiacapre., -All Rights Reserved [Home] Established 1995 - Use any material on this site (w/ attribution)