Covalent Bonding Flashcards
What is covalent bonding?
Strong electrostatic forces of attraction between the positively charged nuclei of both atoms and the negatively charged shared pair of electrons
What do simple molecular compounds have?
Low melting and boiling points because little energy is required to break the weak intermolecular forces
Why do melting and boiling points increase with relative molecular mass?
The strength of the intermolecular forces increases therefore so does the energy required to break them
What do giant covalent compounds have?
High melting and boiling points because a lot of energy is required to break the strong electrostatic forces of attraction
Covalent compounds usually do…
Not conduct electricity
What have high melting and boiling points?
Diamond and graphite
What has low melting and boiling points?
Fullerene due to intermolecular forces
Diamond hardness
Hard
Graphite hardness
Low for forces between layers are weak
Fullerene hardness
Medium due to intermolecular forces
Diamond conductivity
None
Graphite conductivity
Yes since each carbon forms 3 bonds and has 1 free electron
Fullerene conductivity
Fourth electron can only move within each molecule
