Bonding Flashcards
ionic, simple molecular, giant covalent metallic
The structure of metals
LAYERS of positively charged metal IONS closely packed together in a “sea” of DELOCALISED ELECTRONS
Metallic bonding definition
The strong ELECTROSTATIC ATTRACTION between all the positive metal IONS and the delocalised ELECTRONS
Why can metals conduct electricity
The DELOCALISED ELECTRONS are free to MOVE through the structure
Why are metals malleable
The LAYERS OF IONS are able to SLIDE OVER EACH OTHER
Why do metals have a high melting point
It takes A LOT OF ENERGY TO OVERCOME the very strong ELECTROSTATIC ATTRACTION between the positive metal ions and the delocalised electrons
Ionic bonding definition
The strong ELECTROSTATIC ATTRACTION between the OPPOSITELY CHARGED IONS
Why do ionic compounds have a high melting points
It takes A LOT OF ENERGY TO OVERCOME the STRONG ELECTROSTATIC ATTRACTION between the oppositely charged ions
When can ionic compounds conduct electricity
When they are melted or dissolved in water
Why can ionic compounds conduct electricity when they are melted or dissolved in water
The IONS are ABLE TO MOVER AROUND when the compounds is in the liquid state
Why can’t ionic compounds conduct when solid
The IONS are NOT ABLE TO MOVE AROUND
Covalent bonding definition
The STRONG ELECTROSTATIC ATTRACTION between a shared electron pair and the positive nulcei
Why do simple molecular substances have a low melting and boiling point
It DOESN’T take ALOT OF ENERGY TO OVERCOME the WEAK INTERMOLECULAR FORCES between the molecules
Why can’t simple molecular substance conduct electricity
There are NO CHARGED PARTICLES ABLLE TO MOVE AROUND
Why do giant covalent substances have high melting points
It takes A LOT OF ENERGY TO BREAK THE MANY strong covalent bonds between the atoms
Why is diamond very hard
Its takes a lot of energy to break the many strong covalent bonds in thee giant structure
