Below is a diagram showing the particles in iron and an alloy of iron called steel.Use the diagram to explain why steel is harder than iron.Steel contains molecules of different sizes and shapes. These distort the regular arrangement of the iron atoms. As a result, the layers are able to slide over each other.Steel contains atoms of different sizes and shapes. These distort the regular arrangement of the iron atoms. As a result, the layers are unable to slide over each other.Steel contains atoms of the same sizes and shapes. These distort the irregular arrangement of the iron atoms. As a result, the layers are able to slide over each other.Steel contains compounds of the same sizes and shapes. These distort the irregular arrangement of the steel atoms. As a result, the layers are unable to slide over each other.
Question
Below is a diagram showing the particles in iron and an alloy of iron called steel.Use the diagram to explain why steel is harder than iron.Steel contains molecules of different sizes and shapes. These distort the regular arrangement of the iron atoms. As a result, the layers are able to slide over each other.Steel contains atoms of different sizes and shapes. These distort the regular arrangement of the iron atoms. As a result, the layers are unable to slide over each other.Steel contains atoms of the same sizes and shapes. These distort the irregular arrangement of the iron atoms. As a result, the layers are able to slide over each other.Steel contains compounds of the same sizes and shapes. These distort the irregular arrangement of the steel atoms. As a result, the layers are unable to slide over each other.
Solution
The correct explanation is: Steel contains atoms of different sizes and shapes. These distort the regular arrangement of the iron atoms. As a result, the layers are unable to slide over each other.
This is because the addition of other elements to iron to create steel introduces atoms of different sizes and shapes. These atoms disrupt the regular arrangement of the iron atoms, making it more difficult for the layers to slide over each other. This increased difficulty in layer movement results in a harder material, hence why steel is harder than iron.
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Aluminium is a metal. An aluminium alloy is an alloy where tin is the main component. An example of this is duralumin.Duralumin is harder than aluminium.Explain why duralumin is harder than aluminium.Duralumin contains atoms of different sizes and shapes. These distort the regular arrangement of the aluminium atoms. As a result, the layers are unable to slide over each other.Duralumin contains atoms of the same sizes and shapes. These distort the irregular arrangement of the aluminium atoms. As a result, the layers are able to slide over each other.Duralumin contains molecules of different sizes and shapes. These distort the regular arrangement of the aluminium atoms. As a result, the layers are able to slide over each other.Duralumin contains compounds of the same sizes and shapes. These distort the irregular arrangement of the aluminium atoms. As a result, the layers are unable to slide over each other.
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