Chemistry Practice Problems Periodic Trends: Electron Affinity Practice Problems Solution: The lightest halogen is also the most chemically r...

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Solution: The lightest halogen is also the most chemically reactive, and reactivity generally decreases as you move down the column of halogens in the periodic table. Explain this trend in terms of periodic properties.

Problem

The lightest halogen is also the most chemically reactive, and reactivity generally decreases as you move down the column of halogens in the periodic table. Explain this trend in terms of periodic properties.

Solution

We have to explain why the reactivity of halogens decreases as we down the group.


Halogens are elements from group 7A of the periodic table. Halogens react with most metals and nonmetals in the periodic table.

When halogens react with metals, they gain 1 electron to form halide ions.

Take an example of chlorine:

Cl + e- → Cl-

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Periodic Trends: Electron Affinity

Periodic Trends: Electron Affinity

Q. For which element is the gaining of an electron most exothermic?a) Lib) Nc) Fd) B

Solved • Mon Nov 12 2018 12:40:37 GMT-0500 (EST)