Polar covalent compounds
A polar covalent bond is called, if the couple Electron Institute (PEI) more strongly attracted to any one atom.
polarity of a covalent bond is caused by the difference in electronegativity between the bonded atoms.
For example HCl molecule
A polar covalent bond is called, if the couple Electron Institute (PEI) more strongly attracted to any one atom.
polarity of a covalent bond is caused by the difference in electronegativity between the bonded atoms.
For example HCl molecule
Although the H and Cl atoms are equally attractive pair of electrons, but greater than the electronegativity Clatom H.
Consequently Cl atoms attract the electron pair bond (PEI) is stronger than the H atom that lies closer to PEI Cl(resulting in a kind of polar molecules in HCl).
These characteristics are polar covalent compounds when:
1.Berbentuk not symmetric
cont. H2O and NH3
2. Having a dipole moment
Dipole Moment (μ)
Is a quantity that is used to express the polarity of a covalent bond.
formulated:
μ = Q x R, 1 D = 3.33 x 10-30 C.m
caption:
μ = dipole moment, Debye units (D)
Q = the difference in the charge, the units of coulombs (C)
r = distance between the positive charge with a negative charge, units meters (m)
Dipole moment occurs because of covalent compounds formed from two atoms with different electronegativity
Cont.HCl, HBr
Non Polar Covalent Compounds
A covalent bond is said to be non-polar (no pole), if PEI equally strong interest to all atoms.
Because the atoms of an element have similar electronegativity same price.
As a result, the charge of electrons distributed evenly so it does not form the poles.
Cont: H2, Cl2, N2, O2
The characteristics of non-polar covalent compounds
1. symmetrical
For example, compounds
CH4, CCl4, BF3, BeCl2
2. Do not have a dipole moment
Cont.CH4, CCl4, CBr4
Consequently Cl atoms attract the electron pair bond (PEI) is stronger than the H atom that lies closer to PEI Cl(resulting in a kind of polar molecules in HCl).
These characteristics are polar covalent compounds when:
1.Berbentuk not symmetric
cont. H2O and NH3
2. Having a dipole moment
Dipole Moment (μ)
Is a quantity that is used to express the polarity of a covalent bond.
formulated:
μ = Q x R, 1 D = 3.33 x 10-30 C.m
caption:
μ = dipole moment, Debye units (D)
Q = the difference in the charge, the units of coulombs (C)
r = distance between the positive charge with a negative charge, units meters (m)
Dipole moment occurs because of covalent compounds formed from two atoms with different electronegativity
Cont.HCl, HBr
Non Polar Covalent Compounds
A covalent bond is said to be non-polar (no pole), if PEI equally strong interest to all atoms.
Because the atoms of an element have similar electronegativity same price.
As a result, the charge of electrons distributed evenly so it does not form the poles.
Cont: H2, Cl2, N2, O2
The characteristics of non-polar covalent compounds
1. symmetrical
For example, compounds
CH4, CCl4, BF3, BeCl2
2. Do not have a dipole moment
Cont.CH4, CCl4, CBr4
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