Flagging test year 12 Flashcards
Structure of Covalent bond
Simple Molecular or Giant Covalent
Define Covalent bond
Strong electrostatic force of attraction between positive nuclei of the atoms involved and the negatively charged shared pair of electrons.
MPT of Covalent bond
Low melting point as little energy is required to over come the intermolecular forces of attraction.
Can Covalent bonds conduct electricity?
No as there are no ions or delocalised electrons that are free to move.
MPT of Giant Covalent
Many CBs that are strong = High BP due to Giant Covalent structure
Can Giant Covalent structure conduct?
No except graphite
Define an Ionic bond
Strong electrostatic force of attraction between oppositely charged ions.
Structure of ioniclly bonded structures?
Giant ionic lattice
MPT of ionic bonds?
High as lots of energy is required to break the strong ionic bonds
Can ionic bonds conduct electricity?
Only when molten or in aqueous solution as charged particles are free to move.
In solids the charged particles are in fixed positions.
Define a metallic bond?
Strong electrostatic force of attraction between positive metal ions and the sea of delocalised electrons.
Structure of metallically bonded structures?
Giant metallic lattice
MTP in Metallic Bonds?
High as strong electro static force of attraction between metallic ions and sea of delocalised electrons require lots of energy to break.
Can giant metallic structures conduct electricity?
Yes as delocalised electrons are free to move.
