Types of chemical bonding- ionic and covalent bond for class 9

1. INSTRUCTIONAL DESIGN AND PRESENTATION
SKILLS
TYPES OF CHEMICAL
BONDING
BY,
KAAVYAK
21UED026
II-B.Ed Physical science
and English

2. QUESTIONS
What is a bond?
How does a bond
formed?
What is an atom?
What are the particles
present inside a atom?

3. CHEMICAL BONDING
STRONG BOND
° Ionic bond
° Covalent bond
° Coordinate
bond
° Metallic bond
WEAK BOND
° Hydrogen
bond
° Van der walls
interaction

4. STRONG
BOND
IONIC BOND
°Ionic bond, also called electrovalent
bond, type of linkage formed from the
electrostatic attraction between
oppositely charged ions in a chemical
compound.
°Such a bond forms when the valence
(outermost) electrons of one atom are
transferred permanently to another atom.

5. Example
Formation of NaCl

6. Formation of
MgCl2

7. PROPERTIES OF IONIC
COMPOUNDS
1. Physical properties of ionic
compounds
Due to the presence of the strong force
of attraction between the positive and
negative ions, ionic compounds are solids
and are hard to break. They generally break
into pieces when pressure is applied, hence
they are considered brittle.

8. 2. Melting and boiling points of
ionic compounds
Due to the presence of electrostatic
forces of attraction between ions, a
large amount of energy is required to
break the ionic bonds between the
atoms. Thus, ionic compounds have
high melting and boiling points.

9. 3.The solubility of ionic
compounds
Ionic compounds are generally soluble
in polar solvents such as water whereas
solubility tends to decrease in non-polar
solvents such as petrol, gasoline, etc.

10. 4. Conduction of Electricity
Ionic compounds do not
conduct electricity in the solid-
state but are good conductors in
a molten state.

11. COVALENT BOND

12. A covalent bond is a chemical
bond that involves the sharing
of electrons to form electron
pairs between atoms. These
electron pairs are known as
shared pairs or bonding pairs.

13. EXAMPLE
Formationof
Hydrogen molecule

14. Formation of chlorine
molecule

15. Formation of
Methane
molecule

17. THANK YOU