3.1 Covalent bonding model

• Many atoms become more stable if they obtain an outer shell of...


  eight electrons by combining with other atoms
• The octet rule is ..


  Atoms become more stable if they obtain an outer shell of eight electrons.
• Covalent bonding occurs...


  when electrons are shared between atoms
• The covalent bonds formed between atoms within a molecule are generally called

  intramolecular bonds
• Single covalent bonds is when...

  When atom share two electrons, one from each atom.
• Give an example of molecular formula for 2 hydrogen

  H2
• Molecules that contain only two atoms bonded to one another are called...

  Diatomic molecules
• Polyatomic molecules are


  Molecules made up of more than two atoms
• In a hydrogen molecule, the electron of each atom is....

  attracted to the proton within the neighbouring atom, as well as to its own proton.
• In a hydrogen (H2) molecule, where would the shared electron spend most of its time?

  The two electrons will spend most of their time between the two nuclei instead of orbiting their own nuclei.
• Lewis structures are used for...

  represent molecules
• Lewis structures show ...

  the valence shell electrons of an atom, as only these electrons are involved in bonding
• Non-bonding electrons are...

  The outer-shell electrons that are not involved in bonding
• A double covalent bond is...

  When two pairs of electrons are shared between the atoms.
• When three electron pairs are shared between two atoms this is ...

  A triple covalent bond