Bonding Flashcards
(8 cards)
Ionic bond
An ionic bond is an electrostatic attraction between two oppositely charged atoms
Covalent bond
A covalent bond is an electrostatic attraction between two shared pair of electrons and the nuclei
Why do ionic compounds have high melting points
Strong electrostatic attraction
Require lots of energy to overcome
Why do ionic compounds conduct electricity when molten
The ions are free to move so can carry a charge and electrical charge
Why can ionic compounds dissolve in water
- Water molecule is polar so part of it is slight positive and slightly negative
-Water molecules are attracted to the charged ions - They pull the ions away and cause it to dissolve
Example of an ionic compound
Sodium chloride
Why do simple covalent compounds have low melting and boiling points
The intermolecular forces between the molecules only need to be overcome, which doesn’t require a lot of energy due to them being weak. You don’t need to break the covalent bonds within the molecules.
Why don’t simple covalent compounds conduct electricity
Covalent molecules are uncharged
