Bonding 1 Flashcards
Allotrope
Different forms of the same element
Properties of Diamond
Very hard
High melting point and boiling point
Cannot conduct electricity as there is no delocalised electrons
Glittering crystals
Properties of graphite
Soft and slippery
High melting and boiling point
Conducts electricity
Properties of an ionic compound
Mostly soluble in water
High melting and boiling points
Conductive
Brittle
Why do ionic compounds have a high melting and boiling point?
Strong electrostatic forces of attraction between ions require lots of energy (ie temperature) to break the bonds.
Why are some ionic compounds able to dissolve in water?
Water molecules are able to break the force of attraction between the ions
Why cant an ionic compound conduct electricity when solid?
Ions in a solid ionic compound are not free to move
Why can an ionic compound conduct electricity when dissolved in water or molten?
Ions are free to move and carry electrical charge
Why is an ionic compound brittle?
When a force is applied, the ions in the lattice shift so that like ions repel and the lattice breaks
