Metallic bonding and alloys Quiz
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5 questions, one answer each
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1. What is in the sea that surrounds the positive ions in a metal?
- A. Neutrons
- B. Delocalised electrons
- C. Negative ions
- D. Molecules
2. Why are metals malleable?
- A. The ions are fixed in place by covalent bonds
- B. The electrons are held in pairs
- C. Layers of ions can slide over each other while the electrons keep them bonded
- D. The ions can move freely through the metal
3. Why do metals conduct electricity?
- A. Their delocalised electrons carry charge
- B. Their ions are free to move
- C. They have covalent bonds
- D. They are dissolved in water
4. Why is an alloy harder than a pure metal?
- A. It contains weak forces between molecules
- B. Its atoms are all the same size
- C. It has more delocalised electrons
- D. Atoms of a different size disrupt the layers so they cannot slide easily
5. Which is an alloy?
- A. Copper
- B. Steel
- C. Zinc
- D. Iron