Shows atoms and covalent
bonds, so you can tell how
they're joined together.
Shows the atoms, their covalent
bonds and their arrangement in
space next to each other.
Molecular substances have LOW boiling and melting points.
Gasses in the atmosphere are
molecular because they contain
atoms joined together in small
Atoms within the molecules have a
very strong covalent bonds.
But have very weak forces of attraction
between the molecules. Which is why
they're all gasses or liquids at room
temperature and have low melting and
boiling points; because it takes little energy
to separate the weak forces of attraction.
Don't conduct electricity because
there are no free electrons/charges.
Most non-metal elements and
compound form molecular substances.
Dry air is a mixture of gasses
0.04% Carbon Dioxide
Covalent Bonding: Sharing Electrons
Atoms bond covalently to
complete their outer shell.
But rather than gaining or
loosing electrons, atoms
achieve a complete outer
shell by sharing electrons.
Needs just one electron to
complete it's outer shell each atom
bonds with another hydrogen
Which is why hydrogen exists as a diatomic molecule.
Carbon needs FOUR more electrons
to complete it's outer shell, oxygen
So a double covalent bond is formed, as the atoms share 2 electons.
Each atom involved
has to make enough
bonds to fill up it's