Chapter 6
A bond's character is more than 50% ionic if the electronegativity difference between the 2 atoms is greater than
1.7
Covalent Bond
Bond energy
Ionic Bond
Lattice Energy
Metallic Bond
Vaporization Energy
A covalent bond consists of
a shared electron pair
as light strikes the surface of a metal the electrons in the electron sea
absorb and re-emit the light
The fact that metals are malleable and ionic crystals are brittle is best explained in terms of thier
chemical bonds
When a metal is drawn into a wire, the metallic bonds
do not break
The notation for sodium chlordie, NaCl, stands for one
formula unit
Atoms with a strong attraction for electrons they share with another atom exhibit
high electronegativity
In general the strength of the metallic bond____moving from left to right on any row of the periodic table
increases
A chemical bond that results from the electronstatic attraction between positive and negative ions is called an
ionic bond
if a bond's character is more than 50% ionic then the bond is called an
ionic bond
The greater the electronegativity differebce between 2 atoms bonded together the greater the bond's percentage of
ionic character
the lattice energy of compound A is greater than that of compound B. what can be concluded from this fact?
it will be more difficult to break the bonds in compound A than in compound B.
What type of energy best represents the strenght of an ionic bond?
lattice energy
compared with the neutral atoms involved on the formation of an ionic compound. the crystal lattic that results in
lower in potential energy
Mabile electrons in the metallic bonds are responsible for
luster thermal conductivity electrical conductivity
in a crystal of an ionic compund each cation is surrounded by a number of
negative ions
If 2 covalently bonded atoms are identical the bond is identified as
nonpolar covalent
A covalent bond in which there is an unequal attraction for the shared electrons is
polar
Bonds that possess between 5% and 50% ionic character are considered to be
polar covalent
If electrons involved in bonding spend most of the time closer to one atom rather than the other the bond is
polar covalent
A chemical bond between atoms results from the attraction between electrons and
protons
In metals the walence electrons are considered to be
shared by all surrounding atoms
The electrons involved in the formation of a chemical bond are called
valence electrons
The forces of attraction between molecules on a molecular compound are
weaker than the attractive forces in ionic bonding
