Question

Why are the halogens so reactive?

   Why are the halogens so reactive?

Holt Chemistry

R.Thomas Myers,… 1st Edition

Chapter 5, Problem 10

Instant Answer

Solved by Expert Bryan Li

06/24/2020

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This includes fluorine, chlorine, bromine, iodine, and so on. Show more…

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Why are the halogens so reactive?

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Key Concepts

Electron Configuration

Halogens have seven electrons in their outermost shell, meaning they are just one electron short of a complete octet. This configuration drives them to readily accept one electron during chemical reactions, which is a fundamental reason for their high reactivity.

Electronegativity

Halogens are among the most electronegative elements in the periodic table. Their strong tendency to attract electrons in chemical bonds not only helps them form stable compounds quickly but also contributes significantly to their vigorous reactivity.

Electron Affinity

Halogens exhibit high electron affinity, meaning they release a considerable amount of energy when gaining an extra electron. This characteristic's energetically favorable nature is a key factor that makes halogens highly reactive in forming new chemical bonds.

Atomic Size and Shielding

The small atomic radii and low electron shielding in halogens allow for a strong effective nuclear charge on the valence electrons. This intensifies their pull on additional electrons and further enhances their overall reactivity in chemical reactions.

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