L1 /
13
CH1012
MOLECULES
• Molecule : a distinct chemical unit
which contains 2 or more covalently
bound atoms. eg. H2O(l)
which contains 2 or more covalently
bound atoms. eg. H2O(l)
: may be
elements or
compounds. eg. H2(g) , H2O(l)
compounds. eg. H2(g) , H2O(l)
: gases, liquids or solids.
eg. H2O(g) , H2O(l), H2O(s)
eg. H2O(g) , H2O(l), H2O(s)
Snow
crystals
ice : open
hexagonal
structure
hexagonal
structure
Glass surface
H2O surface