Group 2 - Earth Metals

Question 1

Atomic Radius down Group 2

Answer 1

• Increases
• Nuclear charge increases
• Shielding increases
• Outer shell electrons more weakly attracted to nucleus

Question 2

Melting Point down Group 2

Answer 2

• Decreases
• Sea of delocalised electrons are are further away from the nucleus
• Less attraction between nucleus and delocalised electrons
• Magnesium is exception (lowest MP in group 2)

Question 3

Ionisation energy down Group 2

Answer 3

• Decreases
• Nuclear charge increases
• Shielding increases
• Outer shell electron is easier to remove

Question 4

Use of Magnesium

Answer 4

• Used to extract titanium
• TiCl₄(l) + 2Mg(s) –> 2MgCl₂ + Ti(s)

Question 5

Reacti