chem external Flashcards
what are ionic solids made from
non metal + metal
what are molecular solids made from
non metal + non metal
what are covalent networks made from
diamond (carbon 3D), graphite(carbon 3D) and silica (silicon 2D)
what are metallic solids made from
metal + metal
what particles do metal have
metal cations and delocalised electrons
what structure do metallic strucutres have
3D lattice structure with cations next to eachother with electrons flowing freely around them.
what is the bond called between only metal
metallic bonding
why are metals able to conduct
because they have free moving charged electrons which are able to carry the electricity or heat
are metals malleable and ductile
yes, this is because the bond betweeen the atoms are non- directional
what particles do molecular substances have
very small particles with two or more atoms
what bond do molecular substances have
they have covalent bonding
a covalent bond between two identical non-metals has what?
equal sharing of electrons
a covalent bond with two different non-metal has what?
they do not share electrons which is called electronegativity
Although the molecules are bonded together by covalent bonding what do they have on the inside?
intermolecular bonds neighbouring molecules
how much energy do molecules require to seperate
very little
