Question

এই জীবন class 9 bengali
summary please

Answer 1

Answer:

Types of Covalent Bond:

Single Covalent Bond: When a single pair of electrons are shared between two atoms in a molecule. For example; F2, Cl2, H2 etc.

Double Covalent Bond: When two pairs of electrons are shared between two atoms in a molecule. For example; O2, CO2 etc.

Triple Covalent Bond: When three pairs of electrons are shared between two atoms in a molecule. For example; N2 etc.

Electron Dot Structure: The electron dot structures provides a picture of bonding in molecules in terms of the shared pairs of electrons and octet rule.

Formation of Hydrogen Molecule

Atomic number of Hydrogen = 1

Number of valence electrons = 1

Carbon and its Compounds Class 10 Notes Science Chapter 4 1

Formation of CH4 Molecule

Atomic number of Carbon = 6 [2, 4]

Number of valence electrons = 4

Atomic number of Hydrogen = 1

Number of valence electrons = 1

Carbon and its Compounds Class 10 Notes Science Chapter 4 2

Formation of CO2 Molecule

Atomic number of Carbon = 6 [2, 4]

Number of valence electrons = 4

Atomic number of Oxygen = 8 [2, 6]

Number of valence electrons = 6

Carbon and its Compounds Class 10 Notes Science Chapter 4 3