Metallic Bonding, Reactions and Reactivity
Explain metallic conductivity, compare metal reactivity and write equations for reactions with oxygen, water and dilute acids.
How to study National 5 Chemistry
Move between particle explanations, formulae, calculations, experimental evidence and justified conclusions, while using official materials for exact written-paper and assignment practice.
Core concepts
Concept 1
Metallic bonding is the electrostatic attraction between positively charged ions and delocalised electrons.
Exam cue: Name both the positive ions and delocalised electrons when explaining metallic bonding.
Concept 2
Metals conduct electricity because delocalised electrons can move through the structure.
Exam cue: Use equivalent conditions when comparing reaction rates.
Concept 3
Metal reactivity can be compared using reaction rates with oxygen, water or dilute acid, and a suitable excess metal can prepare a soluble salt.
Exam cue: Predict the salt from the metal and acid before balancing the equation.
Risk pitfalls and guardrails
Explaining metal conduction as movement of positive ions through a solid.
Guardrail: Check formulae, charges, units, state or experimental conditions before committing to the final conclusion.
Ranking metals from unequal experiments without controlling conditions.
Guardrail: Check formulae, charges, units, state or experimental conditions before committing to the final conclusion.
Using a metal that does not react with the chosen acid in a salt-preparation method.
Guardrail: Check formulae, charges, units, state or experimental conditions before committing to the final conclusion.
Memory anchors
Metallic bond
Metallic bonding is attraction between positive ions and delocalised electrons.
Metal conductivity
Delocalised electrons move through a metal and carry charge.
Metal plus oxygen
A metal reacting with oxygen forms a metal oxide.
Metal plus water
A reactive metal with water can form a metal hydroxide and hydrogen.
Metal plus acid
A suitable metal with dilute acid forms a salt and hydrogen.
Metal salt preparation
Add excess metal to acid, filter, then evaporate the filtrate.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
What is metallic bonding?
Why do metals conduct electricity as solids?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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