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MyGCSEScience · AQA Chemistry
Metallic Bonding — MyGCSEScience
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FreeScienceLessons · AQA ChemistryMetallic Bonding
Key facts
Metallic bonding — fill in the table
- Metals consist of a giant lattice of positive ions surrounded by a sea of delocalised electrons.
| Term | Meaning |
|---|
| Delocalised electrons | |
| The metallic bond | |
| Metals | |
| Alloys | |
Properties of metals explained — fill in the table
| Property | Explanation |
|---|
| Good conductors of electricity | |
| Good conductors of heat | |
| High melting points | |
| Malleable and ductile | |
| Alloys are harder | |
Exam questions — 4 questions · 12 marks
⚡ Extended questions included. Read the hint. Show all working. AI marks against the real AQA mark scheme.
1 markMetallic conductionAQA 8462 P1 style
Why do metals conduct electricity?
A Metals contain free protons that carry electrical charge
B Metals have delocalised electrons that are free to move and carry electrical charge
C Metals form positive ions that can move through the structure
D Metals absorb electrons from the electrical supply and release them at the other end
3 marksWhy alloys are harderAQA 8462 P1 style
Pure copper is too soft for many uses. Explain why adding zinc to make brass makes the alloy harder than pure copper. (3 marks)
Hint: Pure metal: same-size atoms → layers slide. Alloy: different-size atoms → distort lattice → harder to slide → harder material.
+30 XP
1 markMetallic structureAQA 8462 P1 style
Which statement correctly describes the structure of a metal?
A A regular arrangement of positive ions held together by shared covalent bonds
B A giant lattice of positive metal ions surrounded by a sea of delocalised electrons
C A regular arrangement of neutral atoms held together by intermolecular forces
D Negative metal ions attracted to positive hydrogen ions in water
Quick recall flashcards
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