Covalent Bond Part 2 Flashcards
What is a covalent bond?
A covalent bond is the electrostatic attraction of positively charged non-metal nuclear for shared pair of electrons
There are two types of covalent bonds
Polar and nonpolar
Where do nonpolar covalent bonds occur?
Between non-metal as with the same electronegativity values
What does nonpolitical covalent compounds have as their intermolecular force?
LDF
Polar covalent bonds occur between what?
Non-metal atoms with slightly different electronegativity values
So what’s up with polar covalent bonds
Electrons aren’t shirt equally due to the difference in electronegativity values the atom of the higher electronegativity has a strong attraction for the shared pair of electrons so the electrons are closer to atom
The difference in electronegativity which pulls the share pair of electrons closer to one of the atoms causes what?
It causes one atom to become slightly charged
So then, what’s the ruling of the charges?
The more electronegative element becomes slightly negatively charged due to the presence of the shared pair of electrons. This is signified as S minus.
Then what about the less electronegativity one?
Vice versa
The presence of these electrons produced imbalance in the proton electron ratio. What does it mean?
This means there is more negative charge and positive charge making it slightly negative
So another question do polar molecules have dipoles?
Yes, they have one and that’s slightly positive and one that’s slightly negative
A polar molecule is a molecule with a permanent dipole
Polar molecules are permanent depose which means they’re attraction between or what
Permanent dip permanent dip interactions
The next day on one molecule is electrostatically attracted to the
Positive day on the other molecule, vice versa
Another factors Which decides polarity of
If you are able to put a straight line through its polar
Hydrogen bonding
Oddly strong PDPDI that occur between highly polar molecules
What elements use HB
Nitrogen
Oxygen
Fluorine
Have greater values with high electro negativity values that are greater than hydrogens
Hydrogen bonds
F-H
O-H
N-H
What do these bonds do
Give rise to PDPDI that are stronger than any others
These are weaker than covalent bonds
But stronger than any VDWF
The more of those bonds the higher
The MB
