Chapter 3.3 - Metallic Bonding

Question 1

Properties of metals

Answer 1

• Good conductors of heat and electricity
• Malleable and ductile
• High melting points

Question 2

Explain how metals have high mp ?

Answer 2

• strong metallic bond,

- attraction between positive metal ions and delocalized electrons

Question 3

Explain, in terms of its structure and bonding, why nickel has a high melting point (2)

Answer 3

Structure:
- Contains positive metal ions and delocalized electrons,

Bond
- Strong metallic bond

Question 4

Explain why magnesium has a higher melting point than sodium (2)

Check which element has a greater charge.

Answer 4

• magnesium ion has higher charge than sodium,

- attracts delocalized electrons more strongly, metallic bonding is stronger

Question 5

Explain why strontium has a higher melting point than barium

Answer 5

• Strontium has strong metallic bonding,

- Delocalized electrons closer to cations

Question 6

Explain why calcium has a higher melting point than strontium (2)

Answer 6

• Calcium has a higher melting point bcoz delocalized electrons closer to cations,
• Calcium has strong metallic bonding

Question 7

Describe the bonding in a metal (2)

Answer 7

• positive ions are attracted to delocalized electrons