Question:
Which halogen has the highest value of negative electron gain enthalpy ?
Which halogen has the highest value of negative electron gain enthalpy ?
Updated On: Jun 18, 2022
- Fluorine
- Chlorine
- Bromine
- Iodine
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The Correct Option is B
Solution and Explanation
On moving down the group of halogens, the electron gain enthalpy becomes less negative. Fluorine has less negative electron gain enthalpy than chlorine due to the smaller atomic size of the fluorine atom.
Inter electronic repulsions are stronger in the relatively small $2p$ orbitals of fluorine and there is no much attraction of the nucleus on the incoming electron, due to higher electron density.
Chlorine has the highest value of negative electron gain enthalpy.
Inter electronic repulsions are stronger in the relatively small $2p$ orbitals of fluorine and there is no much attraction of the nucleus on the incoming electron, due to higher electron density.
Chlorine has the highest value of negative electron gain enthalpy.
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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