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Chem Chap 10
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Bond
it is the
force
of attraction between atoms (ions) of a
particle
.
Lewis Theory
Elements lose, gain or share valence electrons to become stable like noble gases
Ionic Bonds
is formed by the
transfer
of
valence electrons
from
metal
to the
non metal
is the
force
of attraction between
oppositely
charged
ions
.
Ionic compounds
Metal + Non metal
Covalent bond
is formed by the sharing of valence electrons between non metallic atoms
Valence electrons
are represented as
dots
around the
symbol
of an element
Always remember for Ionic Compound
transfer dots to non metals (8)
metal (charge) non metal in [] (charge outside)
Formulas ex] CaCl2
Bond pair
is a pair of electrons shared (involved with bond making)
can be single, double or triple
Lone pair
is a pair of electrons not shared (not involved in bond making)
Non polar bond
is a bond formed by
equal
sharing between
similar atoms
Polar bonds
is a bond formed by unequal sharing of electrons between different kinds of atoms
Electronegitivity of an element
is the measure of ability of an element to pull the shared pair of electrons toward itself
(smaller size easily attract electrons)
Pauli's scale of E.N
H-2.1
C-2.5
N-3.0
O-3.5
F-4.0
Fr-0.8
Ex] O>N
N−O
⊕→
Difference in E.N.-----Type
0-0.5 ======= Non polar
0.5-2.0 ====== Polar
2.0 and above ===== Ionic
Lewis structure of Polyatomic ions
Charge particle consisting of groups of atoms bonded (covalent) together.
VSEPR Theory
Valence shell Electron Pair Repulsion Theory
Electrons pairs surrounding the central atoms try to spend as far apart as possible to minimize repulsion and there by attain stability
Polarity of Molecules
Polarity of bonds
Shape of molecules
Net dipole moment
Ex] Net dipole for CO2 molecule is
zero
as it has
linear shape
and is
NON Polar
Net dipole
has a value as bond dipole doesnt (cancel out)
H2O is Polar, bent shape, net dipole has value ≠0
CO2 is Non polar, linear shape, net dipole is zero
Author
babyg7207
ID
246051
Card Set
Chem Chap 10
Description
Chem chap 10
Updated
2013-11-10T01:36:29Z
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