How does the reactivity of the halogens vary within its own group from top to bottom?

Answer 1

As you start with Fluorine, you're at n=2, which means your valence electrons are quite close to the positively charged nucleus. You know that compounds form to fill valence shells; halogens lack only one electron to be blissfully happy. The closer the valence shell is to the nucleus, the more tightly the protons can pull electron density. So Fluorine is the most reactive of the bunch. As you go down the group, the distance to the positively charged nucleus increases, and the halogen is less reactive.

Answer 2

Reactivity for halogens decreases as you descend the group.
Fluorine is the most reactive non-metal in group7.
It is the most electronegative, that is it gains electrons the easiest.
All atoms want to be stable ie have a full valence shell.
F2 has 7 electrons in its outer shell, it needs one more to be stable, because of its small atomic radius the force of attraction between the positive charges in the nucleus and the negative charges in the shell is very strong. Therefore fluorine is able to attract electrons very easily

Answer 3

The top halogen (fluorine) is the most electronegative and most reactive. The reactivity goes down as you go down the column.

Answer 4

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Answer 5

halogens are inert.

Answer 6

well, that means their is more than one knid of something
doesnt it