8.1 Group 2 Flashcards
What are group 2 elements also known as?
Alkaline Earth Metals
What is the most common reaction of group 2 elements?
Redox
What a reducing agent?
An element that reduces another species
What is formed when a group 2 element reacts with oxygen?
Metal oxide
What is formed when a group 2 element reacts with water?
Alkaline hydroxide
What is formed in a reaction between a metal and acid?
Salt and hydrogen
What happens to the ionisation energies as you go down group 2?
It decreases
Why does the ionisation energies decrease down the group 2?
The attraction between the nucleus and outer electrons decreases as the atomic radius and shielding increases.
What is formed in a reaction between a group 2 oxide and water?
Metal hydroxide
What happens to the solubility of hydroxides in water as you go down group 2?
It increases
What is the trend in alkalinity as you go down group 2?
Solubility increases.
pH increases.
Alkalinity increases.
What is calcium hydroxide used for?
Added to fields as lime by farmers to increase pH of acidic soils.
What is magnesium hydroxide used for?
In ‘milk of magnesia’ to treat acid indigestion
