-Chemical_ Bonding
-CovalentBonds-
Bonds between
·
2 non-metals
Sharing of electrons
·
Electronegativity : Measure of the tendency of
on atom to attract a
bonding pair of electrons
Non =Polar-
Equal sharing of electrons
·
No difference
electronegativity
·
in
LEn less than
·
= 0 . 4
-Polar Bands
Unequal Sharing of
·
electrons
Difference
·
in
electronegativity
Forms
-
dipole
Greater difference = more polar
·En = 0 . 4-1 .
7
-Eani?_Bonds
Bonds between
·
metal and non-metal
·
Transfer of electrons
Metal donates its
·
electron
-
Forms a cation
Non-metal accepts
·
electron
-
Forms anion
forces
Causes
strong
·
electrostatic
-
Forms a
giant ionic crystal lattice
Metallic_ Banding-
Bond between metals
·
2
·
Form between positive kernels in a sea of delocalised electrons
·
Smallest particle = positive core ion
Delocalised to from
·
electron moves and each atom
-Polarity -
Yes
Are & Es the No Molecule
covalent bonds polar? molecule ⑭ is
No symetrical Polar
⑭
Yes
Molecule is non-polar a
, Determing Polarity _
-
-Non-polar-
Any monoatomic
·
molecule
Includes diatomic elements
-
Any
·
carbon
molecule with only and
hydrogen
CH4 Calo CHz = CHz
-
; ;
Symetrical
·
molecules
Always non-polar
-
Asymetrical
·
molecule
Only non-polar if DEN less than 4
-
is 0 .
Polar-
Any hydrogen bond
·
-
H -
N ,
0 ,
F
-
Hz0 ; NHe
Asymetrical
·
-Polar if DEN than
is
greater 0 4
.
-CovalentBonds-
Bonds between
·
2 non-metals
Sharing of electrons
·
Electronegativity : Measure of the tendency of
on atom to attract a
bonding pair of electrons
Non =Polar-
Equal sharing of electrons
·
No difference
electronegativity
·
in
LEn less than
·
= 0 . 4
-Polar Bands
Unequal Sharing of
·
electrons
Difference
·
in
electronegativity
Forms
-
dipole
Greater difference = more polar
·En = 0 . 4-1 .
7
-Eani?_Bonds
Bonds between
·
metal and non-metal
·
Transfer of electrons
Metal donates its
·
electron
-
Forms a cation
Non-metal accepts
·
electron
-
Forms anion
forces
Causes
strong
·
electrostatic
-
Forms a
giant ionic crystal lattice
Metallic_ Banding-
Bond between metals
·
2
·
Form between positive kernels in a sea of delocalised electrons
·
Smallest particle = positive core ion
Delocalised to from
·
electron moves and each atom
-Polarity -
Yes
Are & Es the No Molecule
covalent bonds polar? molecule ⑭ is
No symetrical Polar
⑭
Yes
Molecule is non-polar a
, Determing Polarity _
-
-Non-polar-
Any monoatomic
·
molecule
Includes diatomic elements
-
Any
·
carbon
molecule with only and
hydrogen
CH4 Calo CHz = CHz
-
; ;
Symetrical
·
molecules
Always non-polar
-
Asymetrical
·
molecule
Only non-polar if DEN less than 4
-
is 0 .
Polar-
Any hydrogen bond
·
-
H -
N ,
0 ,
F
-
Hz0 ; NHe
Asymetrical
·
-Polar if DEN than
is
greater 0 4
.
