Polarity in Bonds vs Polarity in Molecules    Std 2

Lecture Notes

 

 

Polarity - Bonds between 2 atoms

 

Polar

Non-polar

if 2 atoms are different

if atoms are same

 

                                                           

 

                            

Molecular Polarity

 

Shape

Polar

Non-polar

linear (only 2 atoms)

if atoms are different

if atoms are the same

linear (3 atoms)

outside atoms different

outside atoms same

bent

always

never  ( except O3 )

trigonal planar

outside atoms at least two kinds

outside atoms are all the same

trigonal pyramidal

always polar

never

tetrahedral

outside atoms at least two different kinds

outside atoms all the same