Chemistry Test #3 Flashcards
ionic - melting point
high
ionic - ability to conduct electricity?
only when dissolved or melted
ionic - ability to conduct heat?
low
ionic - hardness
brittle
ionic - are molecules present?
no
covalent - melting point
low
covalent - ability to conduct electricity?
no
covalent - ability to conduct heat?
no
covalent - hardness
soft
covalent - are molecules present?
yes
network - melting point
high
network - ability to conduct electricity?
no
network - ability to conduct heat?
low
network - hardness
hard
network - are molecules present
no
metallic - melting point
high
metallic - ability to conduct electricity
yes
metallic - ability to conduct heat
yes
metallic - hardness
hard
metallic - are molecules present?
no
what is a chemical bond
A force that holds two or more atoms together and makes them function as a unit
why do elements bond?
stable electron configurations
when a bond is formed
energy is released
electrolytes
ions in solution that conduct electricity
what are network solids
covalent bonds in a 3D formation, no individual molecules
what is metallic bonding
metal to metal attraction
electrostatic attraction between the sea of valence electrons and the lineup of cations
how is metallic bonding like both ionic and covalent bonding?
ionic - electrons disassociate from atoms
covalent - share electrons
when do polarcovalent bonds occurr?
two differentnon-metals
polar covalent - charge distribution
assymetrical
shape of polar molecules
linear, bent, pyramidal, tetrahederal
intramolecular forces
esxit within a compund (ionic,covalent)
intermolecular forces
diapole-diapole,hydrgen bonding
how does dipole-dipole occurr
between molecules that have permanent diapoles<– molecules with polar covalent bonds
