Group 2 Flashcards
Does reactivity increase or decrease down the group and why?
Reactivity increases down G2. It’s easier to lose electrons because there is less nucleus attraction therefore the element is more reactive.
Does ionisation energy decrease down the G2 and why?
As you go down the group ionisation energies decrease.
• This is due to the increasing atomic radius and shielding effect.
When group 2 metals react with with water what do they produce?
They produce Hydroxides
• the G2 metals react with water to give a METAL HYDROXIDE and HYDROGEN.
When G2 metals burn in oxygen what do they produce?
They form solid white oxides
When G2 elements react with dilute acid what does it produce?
A salt and hydrogen.
What is group 2 also known by?
Alkali Earth Metals
What G2 compounds used for?
To neutralise acids
What compound is used in agriculture to neutralise acidic soils?
Calcium Hydroxide (slaked lime)
Give a use of Calcium Carbonate.
used in agricultural to neutralise acidic soils
Give a use of magnesium hydroxide.
They are used in some indigestion tablets as antacids.
Group 2 and Hydroxides are _______
Bases
Describe what you would expect to see when magnesium ribbon is added to an excess of dilute hydrochloric acid.
Magnesium would dissolve. Fizzing
Describe one difference you might observe if strontium, instead of magnesium was reacted with dilute hydrochloric acid.
Strontium will react more vigorously tham magnesium
Why are the second ionisation energies of calcium and strontium greater than their first ionisation energies?
- the ion is smaller
* same no. of protons, less electrons
