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you can see the answer at the pic
The drawing is correct because there are 12 atoms of each type on each side of the arrow.
Answer:
is there a table or an equation for that ??
The electromagnetic is a force that combines the effects of electrical charge and magnetism. The electromagnetic force can either attract or repel the particles on which it acts.
It looks like part of the Periodic Table. Do you have to write down the most common Periodic Table elements? If so, then that's probably what you should do.
