A1 - Metallic Bonding Flashcards
Define metallic bonding
The strong electrostatic attraction between positive metal ions and a sea of delocalised electrons.
What structure do all metals have
Giant metallic lattice
Describe a giant metallic lattice
Layers/rows of positive metal ions surrounded by a sea of delocalised electrons
What bonding do all metals have
Metallic bonding
What bonding would be present in a sample of sodium
Metallic bonding
What bonding would be present in a sample of aluminium
Metallic bonding
Why is the bonding in magnesium stronger than the bonding in sodium
Mg ions have a greater charge of 2+
Mg ions have given up 2 electrons in sea of delocalised electrons
Mg ions are smaller
Metallic bonding is stronger in magnesium than sodium
Why is the bonding in aluminium stronger than the bonding in sodium
Al ions have a greater charge of 3+
Al ions have given up 3 electrons in sea of delocalised electrons
Al ions are smaller
Metallic bonding is stronger in aluminium than sodium
Which of the following would have the strongest metallic bonds:
Li or Be
Be
As Be ions are smaller/more charged so metallic bonding is stronger
Which of the following would have the strongest metallic bonds:
Li or K
Li
As Li ions are smaller so metallic bonding is stronger
Which of the following would have the strongest metallic bonds:
Ca or K
Ca
As Ca ions are smaller/more charged so metallic bonding is stronger
Why are all metals good conductors of electricity
Delocalised electrons are free to move so will conduct a flow of current
Why are all metals good conductors of heat
Delocalised electrons are free to move so will transfer energy through the metal
Why do most metals have such high melting/boiling points
There is a strong electrostatic force of attraction between the positive metal ions and delocalised electrons.
Metallic bonds are strong
What property allows metals to be hammered into shapes
Malleable
What property allows metals to be stretched into wires
Ductile
Explain why metals are malleable
Rows of metal ions can slide past one another without breaking the metallic bonds
Explain why metals are ductile
Rows of metal ions can slide past one another without breaking the metallic bonds
Which metal has the higher melting point out of the following:
Mg or Be
Be
Be is a smaller ion so will have stronger metallic bonds
Which metal has the higher melting point out of the following:
Na or K
Na
Na is a smaller ion so will have stronger metallic bonds
