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The reactivity of elements is generally explained as their tendency to attain

Question
The reactivity of elements is generally explained as their tendency to attain
Zero electrons in every shell
A completely filled outer (valence) shell, i.e. noble gas configuration
A negatively charged nucleus
The maximum possible atomic mass
Answer
A completely filled outer (valence) shell, i.e. noble gas configuration
Detailed Explanation
Elements react in order to attain a stable, completely filled valence shell, like that of noble gases.
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