Question

[ Write in your own words !! ]

(1) = What do you mean by hydrogen bonding ?

(2) = What do you mean by :

(i) Atomic radius ?
(ii) Covalent radius ?
(iii) Metallic radius ?
(iv) Ionic radius ?

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Answer 1

Answers:

Hydrogen Bonding:

The force of attraction between hydrogen which is already covalently bonded and more electronegative atom present in the system is known as hydrogen bonding.

Conditions for Hydrogen Bonding:

• Size of electronegative atom must be small.
• Hydrogen bond is always between highly electronegative atoms.

Types of Hydrogen Bonding:

• Intermolecular Hydrogen Bonding.
• Interamolecular Hydrogen Bonding.

Atomic radius:

• Atomic radius is the radius of an atom. It measures the size of an atom.
• If the element is a metal, then the atomic radius refers to the metallic radius.
• And if the element is a non-metal, then it refers to the covalent radius.

Ionic radius:

• Ionic radius means the radius of an ion. The ionic radii can be calculated by measuring the distances between the cations and anions in ionic crystals.

Answer 2

Answer:

A1) Hydrogen Bonding: Hydrogen Bonding is the bonding that is developed between Hydrogen atom and one of the most electronegative atom such as N, O and any Halides.

E.g.: H₂O, HCl, HNO₃, etc.

A2) i) Atomic Radius: It is the radius of atom which is measured by the distance between two centres of an atom. In simpler terms, it is defined as distance present between the centres of two bonded atoms.

ii) Covalent Radius: It is distance between two atoms which are joined by a covalent bond.

iii) Metallic Radius: It is the distance present between the centres of two atoms which are bonded by a metallic bond.

iv) Ionic Radius: It is the distance present between the centres of two atoms which are bonded by an ionic bond.

Hope it helped !!