C5 Chemical Changes Flashcards
What happens to the reactivity of metals when you go down group one
The reactivity increases
Order of metal reactivity in group 1
1-potassium (most reactive)
2-sodium
3-lithium.
What are the three most reactive metals
Postasium, sodium and magnesium
What are the three least reactive metals
Platinum
Gold
Silver
2 ways potassium sodium lithium and calcium react with water
- They fizz
- They leave an alkaline solution of metal hydroxide
How do magnesium, aluminium, zinc and iron react with water
There is a very slow reaction
How do tin and lead react with water
Slight reaction with steam
How do copper, silver and gold react with water
No reaction, even with steam
What is oxidation
The loss of electrons
What is reduction
The gain of electrons
What is an ionic equation
Shows only the atoms and ions that change in a reaction
Where do metals come from
The earth’s crust
What is a metal ore
when there is enough metal or metal compound in a rock to make it worth extracting the metal.
What is a displacement reaction
When a more reactive metal will displace a less reactive metal from its aqueous solution
Why is carbon used to extract metals
Many metals are found combined with oxygen as metal oxides. Due to carbin being more reactive it is used to extract the metals from their oxides
