|How does the sum of the charges on the positive
ions compare to the sum of the charges on the
negative ions in ionic compounds?
Stable compounds have a NET charge of zero.
Hence the sum of positive and negative is equal to
They must be equal, by definition! Otherwise
you would get a shock everytime you touch ,for
example, some table salt (NaCl).
In any material, under equilibrium conditions,
the positive and negative charges are exactly
balanced with each other. So the sum of all the
positive charges is equal to the sum of all the
negative charges. If there were a net positive
charge in a block of salt, for example, then it
would attract electrons (which are negatively
charged) from other materials nearby, including
air. This would continue until the positive
charge was exactly neutralized by negative charge
from the electrons.
But I get the feeling
there's more to your question. Could you rephrase
it if I missed something?
They have to be equal. A net negative or net
positive charge on any object will create
tremendous voltages between it and any other
object with a net charge, or even a neutral
charge. Electrical current will flow to neutralize
the charge. If there is no circuit to connect the
two objects, then if the voltage is very large at
all, it will MAKE a circuit - that's what causes
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