Group 2 metals

What element is not considered in the trends of group 2

Beryllium

What happens to the size of the atoms down group 2

Size increases down the group

What happens to ionisation energies down group 2

Ionisation energy decreases down the group as the outer electrons gets further away from the nucleus. This increases shielding making it easier to remove an electron

What happens to the strength of metallic bonds down group 2

Strength of metallic bonds decreases down the group

What happens to the melting point in group 2

Melting point decreases down the group

What is the exception in melting points in group 2

Magnesium as it has the lowest melting point but is the highest in the group

How is titanium extracted

Titanium dioxide is converted to tetrachloride by reacting with chlorine gas at high temperature in present of coke

Titanium tetrachloride is reduced by magnesium

What happens to reactivity with water down group 2

Reactivity with water increases

Formula of group 2 reaction with water

M + 2H2O → M(OH)2 + H2 (g)

Formula of group 2 reaction with steam

M + H20 (g) → M(O) + H2 (g)

What colour are group 2 hydroxides

White solids

What is the solubility of group 2 hydroxides going down the group

Solubility increases down the group

What happens when calcium hydroxide is dissolved in water

Limewater is formed

Formula of barium hydroxide dissolving in water

Ba(OH)2 → Ba2+ + 2OH-

What is the solubility of group 2 sulfates going down the group

Solubility decreases down the group

How to test for sulfate ions

Add acid to solution

Add barium chloride to solution. If white precipitate forms, sulfates are present

What is the use of magnesium hydroxide

Used as a laxative

What is the use of barium sulfate

Used in radiographic imagery due to low solubility

What is the use of calcium hydroxide

Adjusts soil ph