Search for notes by fellow students, in your own course and all over the country.
Browse our notes for titles which look like what you need, you can preview any of the notes via a sample of the contents. After you're happy these are the notes you're after simply pop them into your shopping cart.
Title: Polarity of bonds and molecules
Description: definition and explanation of polarity of bonds and molecules
Description: definition and explanation of polarity of bonds and molecules
Document Preview
Extracts from the notes are below, to see the PDF you'll receive please use the links above
POLARITY OF BONDS AND MOLECULES
Polarity: definition
In chemical bonding, polarity refers to the distribution of electrical
charge across the atoms joined by the bond
...
Polarity of bonds:
Bond Polarity is the measure of the extent to which a bond exhibits
polarity
...
The polarity of bonds is caused due to the interaction of the bonds
between molecules and atoms with different electronegativities
...
The electrons eventually spend more time at the Fluorine atom
...
The reasons which lead to the polarity of
bonds are:
1
...
2
...
Formation of a diapole:
A covalent bond involves the mutual sharing of valence electrons of
the participating atom
...
When atoms share their electrons, it tends to happen that the atom
having higher electronegativity than the other pulls the shared pair of
electrons more towards itself
...
The formation of a dipole results in a charge separation in such a type
of bond, with one atom being slightly more positive and the other being
more negative
...
As dipole formation is a characteristic of bond polarity, the molecules
exhibiting dipoles are more precisely called Polar covalent molecules
...
Conversely, the atom with a less electronegative value
acquires a slightly positive charge (+δ)(+δ)
...
If a molecule has more dipole moments than the other, it is more
polar than other molecules
...
in a polar covalent bond, the two bonded
atoms do not share the electrons equally, unless the bond connects two
atoms of the same element
...
The ability of an atom to attract electrons in the presence of another
atom is a measurable property called electronegativity and will produce a
dipole moment
...
A covalent bond with an unequal sharing of electrons and
the electronegativity difference within the range of 0
...
1−2 is called a
polar covalent bond
...
A bond that is formed by the equal sharing of electrons between the
combining atoms is called a nonpolar covalent bond
...
Hence, identical pairs of atoms form a nonpolar
covalent bond
...
50
...
Let us
consider the example of the oxygen molecule
...
This is because
both atoms have the same electronegativity, and electrons are shared
equally between them
Title: Polarity of bonds and molecules
Description: definition and explanation of polarity of bonds and molecules
Description: definition and explanation of polarity of bonds and molecules