Question:
The correct order of reactivity of halogen is
The correct order of reactivity of halogen is
Updated On: Jul 2, 2022
- $F > Cl > Br > I$
- $F < C l < B r < I$
- $F < Cl > Br > I$
- $F > Cl < Br < I$
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The Correct Option is A
Solution and Explanation
The order of reactivity is $F >\, Cl > \,Br >\,I$ It is due to the following factors :
(i) As atomic size increases the attraction for an additional electron by the nucleus becomes less. Thus, reactivity decreases.
(ii) Due to decrease in electronegativity from $F$ to $I$, the bond between halogen and other elements becomes weaker and weaker. Thus, fluorides are most stable while iodides are least.
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Concepts Used:
P-Block Elements
- P block elements are those in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons, therefore in all there are six groups of p-block elements.
- P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.
P block elements consist of:
- Group 13 Elements: Boron family
- Group 14 Elements: Carbon family
- Group 15 Elements: Nitrogen family
- Group 16 Elements: Oxygen family
- Group 17 Elements: Fluorine family
- Group 18 Elements: Neon family