Chapter 6 Flashcards
(22 cards)
Why do atoms bond?
to gain a full valence shell and become more stable
what is a chemical bond?
a force that holds 2 or more atoms together
what are the three types of main chemical bonds?
Ionic, covalent, and metallic bods
what are ionic bonds made of?
metal (cation) and non-metal (anion)
how are electrons managed in ionic bonds?
They are transferred from the cation to the anion
What are covalent bonds made of
a non-metal and a non-metal
how are covalent bonds electrons managed?
electrons in covalent bonds are shared
what are the two kinds of covalent bond?
Polar and non-polar bonds
in polar covalent bonds electrons are
unequally shared
in non-polar bonds electrons are
equally shared
what are metallic bonds made of?
a metal and a metal
how are electrons managed in a metallic bond?
they are shared in a “sea” of electrons
Practice classifying substances as ionic, covalent, or metallic
on page 2 of lecture notes
the ability of an atom to attract electrons is
electronegativity
what is the difference in electronegativity in ionic bonds?
it is a large difference 1.7 to 4.0
what is the electronegativity difference in polar covalent bonds?
creates a dipole force, difference in electronegativity is o.3 - 1.6
what is the electronegativity difference for non-polar covalent bonds
0 - 0.3
what is the electronegativity difference for metallic bond?
it is just low, no exact numbers
molecular (covalent) compounds are usually found in what two phases?
liquid and gas
ionic compounds are usually in what physical state?
solid
group 15 forms what ions?
-3
what enables metallic bonds to conduct electricity?
the sea of electrons, they flow and conduct electrons
