Question

Observe the Modern Periodic Table and explain the gradation in reactivity of Halogen family.
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Answer 1

Halogens are highly reactive, and they can be harmful or lethal to biological organisms in sufficient quantities. This reactivity is due to high electronegativity and high effective nuclear charge. Halogens can gain an electron by reacting with atoms of other elements. Fluorine is one of the most reactive elements.

Answer 2

Answer

As studying the Modern periodic table, The group 17 contains the members of the halogen family.

All of them have the general formula X 2

. A gradation is observed in their physical state down the group.

Thus, fluorine (F 2 ) and chlorine (Cl 2 ) are gases. Bromine (Br 2 ) is a liquid while iodine (I 2 ) is a solid.

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