Topic 9 - 9.1 - Properties of Metals, Metallic Bonding Flashcards
1
Q
Name 5 properties of metals
A
- Sonorous - makes a ringing sound
- Malleable - can be bent into a shape
- Ductile - can be drawn into a thin wire
- Conductors of heat and electricity
- Shiny
2
Q
- What is the structure of metals?
- How are most metals malleable or ductile?
A
- Crystal
- They consist of layers of ions that can slide over each other when the metal is bent, hammered or pressed.
3
Q
Define Metallic Bonding
A
The electrostatic force of attraction between positive metal ions and delocalised electrons that holds metal atoms together
E.g. Gold
4
Q
What is the purpose of the delocalised electrons that are present in metals?
A
- Attracts the positive ions, holding them together
- Balances the repulsion between positive ions, stopping them from being pulled/forced apart.
5
Q
Describe the relationship between the number of outer electrons a metal has and its melting and boiling points
A
Greater number of outer electrons = Higher melting/boiling point
* due to the increased +ve charge on the metal ion and the increased number of electrons that are delocalised = stronger bonding.
6
Q
What component of a metal allows it to conduct electricity and how?
A
- Delocalised electrons, as they are free to move around and carry charge