To become stable.
Valence electrons
are involved in
bonding.
V = ____
The combining of atoms to
form molecules or
compounds.
+
Soft, metal
=
Poisonous gas
1. Ionic Bonds: formed when atoms
lose or gain
e
Atoms start off neutral.
When they lose or gain
-, they become ions.
e
IONS are
charged
atoms
Occurs between a METAL
and a NONMETAL
19
Ionic Bonds
Metal to Nonmetal
Electrons either taken or given away
Sodium
+
Chlorine
Opposites attract
Metals form CATIONS (+)
Na
Give
Away
Nonmetals form ANIONS (-)
Cl
Take
in
The (-) ion and (+) ion attract.
(1+)
Na
Cl
(1-)
Na Cl
A neutral compound
Ionic Bonds
The Strongest wins the battle
and loses the bone (electron)
Ionic Bonds
An ionic bond is the resulting attraction for
an anion and a cation after an electron is
transferred from the metal to the non-metal
2. Covalent Bonds: formed when atoms
share e-; occurs b/t two nonmetals
Diatomic Molecules atoms of the same element
share e-
BrINClHOF
Cl Cl
Covalent Bonding
Dogs of equal strength
Covalent Bonds
A covalent bond exists when two
electrons are shared by two nonmetallic atoms
Ionic Bonds: formed between a
metal & non-metal.
Covalent Bond: formed between
two non-metals.
3. Metallic Bonds: formed when metals
bond with other metals.
(sea of electrons)
*Accounts
for many physical
characteristics of metals, such as strength,
malleability, conduction of heat and
electricity, etc.
Metallic Bonds
Mellow dogs with plenty
of bones to go around !
Metallic Bonding
Metallic bonds are best
characterized by the phrase "a sea
of electrons”
A quick Review of Bonds:
Ionic
Metal (+)
Nonmetal (-)
Transfer of electrons creates ions that attract.
Covalent
Nonmetal
Nonmetal
The sharing of electrons creates. (BrINClHOF)
Metal
Metal
electrons
Metal
Metal
Metallic
Metal
All electrons are shared in a “sea of electrons.”