Define electronegativity. How does it differ from electron gain enthalpy?
Solution and Explanation
Electronegativity is the ability of an atom in a chemical compound to attract a bond pair of electrons towards itself.
Electronegativity of any given element is not constant. It varies according to the element to which it is bound. It is not a measurable quantity. It is only a relative number.
On the other hand, electron gain enthalpy is the enthalpy change that takes place when an electron is added to a neutral gaseous atom to form an anion. It can be negative or positive depending upon whether the electron is added or removed. An element has a constant value of the electron gain enthalpy that can be measured experimentally.
Top Questions on Ionic or Electrovalent Bond
- Strong ionic bond is formed between ____ and ____ group elements.
- AP POLYCET - 2024
- Chemistry
- Ionic or Electrovalent Bond
- When a metal atom forms ionic bond with a non-metal atom, the metal atom will
- AP POLYCET - 2021
- Chemistry
- Ionic or Electrovalent Bond
- lonic bond is formed due to which of the following?
- AP POLYCET - 2021
- Chemistry
- Ionic or Electrovalent Bond
- The shape of molecule with 4 bond pairs and zero lone pair is 4
- AP POLYCET - 2019
- Chemistry
- Ionic or Electrovalent Bond
- 'Sigma bond' is formed by
- AP POLYCET - 2019
- Chemistry
- Ionic or Electrovalent Bond
Questions Asked in CBSE Class XI exam
- Solve the following inequalities and represent the solution graphically on number line: 3x –7 > 2(x-6), 6-x > 11-2x.
- CBSE Class XI
- Algebraic Solutions of Linear Inequalities in One Variable and their Graphical Representation
- Prove that, cos 6 x = 32cos6 x-48cos4 x+18cos2 x -1.
- CBSE Class XI
- Trigonometric Functions of Sum and Difference of Two Angles
- Three reasons why the author’s grandmother was disturbed when he started going to the city school.
- CBSE Class XI
- The Portrait of a lady
- Prove that cos2 2x-cos2 6x = sin 4x sin 8x
- CBSE Class XI
- Trigonometric Functions of Sum and Difference of Two Angles
Give reasons for the following.
(i) King Tut’s body has been subjected to repeated scrutiny.
(ii) Howard Carter’s investigation was resented.
(iii) Carter had to chisel away the solidified resins to raise the king’s remains.
(iv) Tut’s body was buried along with gilded treasures.
(v) The boy king changed his name from Tutankhaten to Tutankhamun.- CBSE Class XI
- Discovering Tut: The saga Continues
Concepts Used:
Chemical Bonding and Molecular Structure
Such a group of atoms is called a molecule. Obviously, there must be some force that holds these constituent atoms together in the molecules. The attractive force which holds various constituents (atoms, ions, etc.) together in different chemical species is called a chemical bond.
Types of Chemical Bonds:
There are 4 types of chemical bonds which are formed by atoms or molecules to yield compounds.
- Ionic Bonds - Ionic bonding is a type of chemical bonding which involves a transfer of electrons from one atom or molecule to another.
- Covalent Bonds - Compounds that contain carbon commonly exhibit this type of chemical bonding.
- Hydrogen Bonds - It is a type of polar covalent bonding between oxygen and hydrogen wherein the hydrogen develops a partial positive charge
- Polar Bonds - In Polar Covalent chemical bonding, electrons are shared unequally since the more electronegative atom pulls the electron pair closer to itself and away from the less electronegative atom.
Factors Affecting Bond Enthalpy in Chemical Bonding:
- Size of the Atom
- Multiplicity of Bonds
- Number of Lone Pair of Electrons Present
- Bond Angle