Question

To form anion, non-metal atom
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Answer 1

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Consequently, they tend to lose electrons and form cations. Conversely, most nonmetallic atoms attract electrons more strongly than metallic atoms, and so gain electrons to form anions.

Answer 2

Non-metals are on the right of the periodic table. They are also Group A elements. This is significant because it means the group number is the same as the number of valence electrons. They also reside in the p-block which means these valence electrons are also p electrons. Now go to the end of the period and you will find the nearest nobel gas which has an electronic configuration that shows a full p shell (i.e.6).

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