Metals Flashcards
What are metals held together by?
Metallic bonds
When do metallic bonds arise?
When the outer electrons from metal atoms are free to move throughout the metallic lattice
What do metallic bonds make when they are free to move?
A positive core and a sea of delocalised electrons
What is metallic bonding?
The electrostatic force of attraction between positively charged ions and delocalised electrons
What is a current?
A flow of charges particles
In metals, what is the charged particles that flow?
The delocalised electrons
What is an oxidation reaction?
Loss of electrons
What is a reduction reaction?
Gain of electrons
What are metals found in the earths crust as?
Ores
Name the 3 ways used to extract metal ores
- Heat alone
- Heating with carbon
- Electrolysis
Define electrolysis
The decomposition of an ionic compound into its element using electricity
Do positive ions gain or lose electrons at the negative electrode?
Gain
Do negative ions gain or lose electrons at the negative electrode?
Lose
What can be used to make cells?
Metals
How do we create an electrochemical cell?
Combine 2 different metals with an electrolyte to complete the circuit
