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Topic 2a - Covalent Bonding (What is covalent bonding? (Formed when a pair…
Topic 2a - Covalent Bonding
What is covalent bonding?
Formed when a pair of electrons is shared between two atoms
Between non-metal and non-metal
Positive nuclei of bonded atoms are attracted to the shared pair of electrons by electrostatic forces making the bonds very strong
Representing covalent bonding
Dot and cross diagrams
Shared electrons drawn in overlap between outer orbitals of the two atoms
Can show double covalent bonds
Adv
Which atoms electrons came from
Dis
Don't show relative sizes
Don't show how atoms arranged in space
Displayed formulas
Shows covalent bonds as single lines between atoms
Adv
Great for showing big molecules
Dis
Don't show 3D structure of molecule
Don't show where electrons came from
3D models and ball and stick models
3D shows atoms and arrangement in space
Ball and stick models show bonds
Ball and stick models can show double bonds too
Dis
Can quickly get confusing for large molecules
Don't show where electrons come from