# Is CH3F polar or non-polar

In general, the rule applies that a bond between metal and non-metal is usually an ionic bond
(e.g. NaCl, KBr), while two non-metals are generally linked by an electron pair bond.

However, the scientist Pauling wanted to investigate this more closely and developed a table of values ​​for the electronegativities with which he wanted to determine the type of bond in a connection more precisely.

According to Pauling surrender

-> non-polar electron pair bond with a partner electronegativity difference of EN 0 - 0.5
-> polar electron pair bond with a partner electronegativity difference of EN 0.5 - 1.7
-> Ionic bond with a partner electronegativity difference of EN> 1.7

Electonegativities according to Pauling:

Let's take the example: sodium chloride.

EN Na: 0.82
EN Cl: 3.16
The EN = 2.34 and is higher than the limit value ( EN> 1.7)
Consequently, sodium chloride is an ionic bond

Molecular formulaStructural formulaEN valueReason
polar
Electron
couple bondSince the EN is between 0.5 - 1.7, it is a clear polar electron pair bond!
Since the EN is greater than 1.7, it is a clear ion bond!

polar
Electron
couple bondSince the EN is between 0.5 - 1.7, it is a clear polar electron pair bond!
Bond P-H:
non-polar
Electron
couple bond

Bond P-Br:
polar electron
couple bond
A distinction must be made here between the P-H bond and the P-Br bond.

The P-Br bond is polar because the EN> 0.5.

The P-H bond is non-polar because the EN = 0.0.
Bond C-H:
non-polar
Electron
couple bond

Bond C-O:
polar electron
couple bond

Bond O-H:
polar electron
couple bond A distinction must be made here between the C-H bond, the C-O bond and the O-H bond.

The bond C-H is non-polar because the
EN <0.5.

The C-O bond is polar because the EN is between 0.5 and the limit value 1.7.

The bond O-H is polar because the EN is between 0.5 and the limit value 1.7.
Ionic bondSince the EN is greater than 1.7, it is a clear ion bond!

polar electron
couple bond
Since the EN is between 0.5 - 1.7, it is a clear polar electron pair bond!