Nonmetals tend to form anions by gaining electrons to form a noble gas configuration.
Non-metals typically have a high charge/size ratio.
Consequently, electrons are drawn to them.
Since they have two options for achieving noble gas configuration, they often aim to fulfill their octate.
First, free electrons. Secondly, it acquires electrons since it is simple to remove one or two electrons from non-metals due to their high charge/size ratio. However, getting rid of them all would be like pushing a mountain. You require superhuman power, or a lot of energy, for this. The same is true for non-metals; to remove every electron, you would need an enormous amount of energy that is not conceivable thermodynamically. If they acquire an electron, they can readily achieve the configuration of a noble gas because they naturally attract electrons.
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