X is a shiny silver-coloured solid at room temperature and pressure. $$$X$$$ is a good conductor of heat and electricity when solid. Which statement about X is correct?

X is an ionic compound or a metallic element.

$X$ is a metallic element or a non-metallic element.

X is an alloy or a metallic element.

X is an alloy or a non-metallic element.

Chemistry

IGCSE&ALevel

CAIE

Exam No：0620_s24_qp_11 Year：2024 Question No：25

Answer:

Knowledge points:

9.3.1.1. brass as a mixture of copper and zinc

9.3.1.2. stainless steel as a mixture of iron and other elements such as chromium, nickel and carbon

9.3.2. State that alloys can be harder and stronger than the pure metals and are more useful

9.3.3. Describe the uses of alloys in terms of their physical properties, including stainless steel in cutlery because of its hardness and resistance to rusting

9.3.4. Identify representations of alloys from diagrams of structure

9.3.5. Explain in terms of structure how alloys can be harder and stronger than the pure metals because the different sized atoms in alloys mean the layers can no longer slide over each other

X is a shiny silver-coloured solid at room temperature and pressure. $$\(X\)$$ is a good conductor of heat and electricity when solid. Which statement about X is correct?

Answer:

Knowledge points:

Solution:

X is a shiny silver-coloured solid at room temperature and pressure. $$\(X\)$$ is a good conductor of heat and electricity when solid. Which statement about X is correct?

Answer:

Knowledge points:

Solution:

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