0 votes
in Chemistry by (60.5k points)

Give any two limitations of octet rule

1 Answer

+1 vote
by (63.5k points)
selected by
Best answer

(a) It fails to explain the incomplete octet of the central atom.

Examples: The central atom Li, Be and B in LiCl, BeCl2 and BCl3 have 1,2 and 3 valence electrons only respectively. 

(b) The octet rule is not satisfied for the atoms in a molecule having an odd no of electrons.

Examples: NO and NO2 

(c) The octet rule cannot be applied in case of elements in and beyond the third period of the periodic table since these elements have more than 8 electrons. 

Examples: PF5, SF6,H2SO4 etc., 

(d) This rule fails to explain the shape and relative stability of molecules. 

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.