Unit 5: Attractive Forces

PHENOMENON: Why did the pipe corrode?

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The modern model of the atom has evolved over a long period of time through the work of many scientists. (3.1a)
The electron is negatively charged. (3.1d)
An oxidation-reduction (redox) reaction involves the transfer of electrons (e-). (3.2d)
Reduction is the gain of electrons. (3.2e)
A half-reaction can be written to represent reduction. (3.2f)
Oxidation is the loss of electrons. (3.2g)
A half-reaction can be written to represent oxidation. (3.2h)
In a redox reaction the number of electrons lost is equal to the number of electrons gained. (3.3b)
Oxidation numbers (states) can be assigned to atoms and ions. Changes in oxidation numbers indicate that oxidation and reduction have occurred.