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How do electrons of an element determine that element's reactivity?
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How do electrons of an element determine that element's reactivity?

User Patrycja K
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Answer:

The number of electrons in the outermost shell of an atom determines its reactivity. Noble gases have low reactivity because they have full electron shells. Halogens are highly reactive because they readily gain an electron to fill their outermost shell.

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User Dangerismycat
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