Formulation of chemical bond between
atoms of elements is based on
A. electronegative character of elemen
B. octet rule
C. electropositive character of element
D. Pauli exclusion principle
Answers
Answer:
Chemical bond is an attractive force that bounds the constituents of a chemical species together.
Theories like valence shell electron pair repulsion theory, electronic theory,
molecular orbital theory and valence bond theory have explained the formation of chemical bond.
The formation of a chemical bond is the tendency of the system to achieve stability.
An atom is said to be stable when it attains noble gas configuration that is the outermost orbitals are completely filled.
Atoms combine with one another and fill their separate octets.
Draw the Lewis structures for the following molecules and ions:
H2S, SiCl4, BeF2, CO32-, HCOOH
Answer.
Class_11_Chemistry_Chemical_BondingClass_11_Chemistry_Chemical_Bonding_Structure
Question 4.5
Define octet rule. Write the significance and limitations.
Answer.
Atoms of elements combine with each other in order to complete their respective octets so as to acquire stable gas configuration,
this is octet rule.
This is also called as electronic theory. It was given by Kossel and Lewis.
Significance of Octet rule: This explains the chemical bond formation depending upon the nature of element.
Different atoms combine with each other to form ionic or covalent compounds.
Limitations of Octet rule:
Octet rule fails to predict the relative stability and shape of the molecules.
Octet rule is based on the inert nature of noble gases. But some inert gases like Kr and Xe forms compounds.
This does not account for shape of molecules.
If compound is having less than 8 electrons surrounding central atom, then octet rule cannot be applied to such compound. For example: BeH2
Explanation: