Metallic bonding and types of crystal structure Quiz
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5 questions, one answer each
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1. Which substance conducts electricity when solid and when molten?
- A. Sodium chloride
- B. Magnesium
- C. Iodine
- D. Diamond
2. Which structure is present in iodine?
- A. Giant ionic
- B. Giant metallic
- C. Macromolecular
- D. Simple molecular
3. What happens to the bonding when ice melts?
- A. Some hydrogen bonds between molecules break
- B. Covalent bonds in water molecules break
- C. Metallic bonds break
- D. Ionic bonds break
4. Why is the melting point of graphite very high?
- A. Weak forces between layers are very strong
- B. Delocalised electrons are held between layers by ionic bonds
- C. Many strong covalent bonds in the layers must be broken
- D. Its molecules are very large
5. Why does solid sodium chloride not conduct electricity?
- A. It has no ions
- B. Its ions are fixed in the lattice and cannot move
- C. Its electrons are delocalised but held tightly
- D. It is covalent