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CBSE Class 10 Science Chapter 3 Metals and Non-Metals Revision Notes

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CBSE Class 10 Science Chapter 3 Metals and Non-Metals Revision Notes

 

Revision is one of the most important aspects of learning as it helps you to remember facts, figures, and topics that you have covered earlier. Students are always advised to summarize whatever they have learned as Revision Notes. CBSE Class 10 Science Chapter 3 Metals and Non-Metals Revision Notes are very crucial for the students of 10th class to clear their doubts and excel in their examination.

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Metals

 

Metals occur in nature in free as well as combined form. The Earth’s crust is the major source of metals. Some metals are found in the earth’s crust in the free state, such as gold, silver, mercury, etc. and some are found in the form of their compounds owing to their higher reactivity.

 

Physical properties of metals:

•Solid at room temperature except for mercury
• Ductile (can be drawn into wires)

• Malleable (can be beaten into thin sheets)
• Sonorous (can produce sound)
• Lustrous (contain a natural shine)
• Have a high melting point except for cesium and gallium that have a very low melting point
• Generally good conductors of heat and electricity. While silver and copper are the best conductors of heat, lead and mercury are comparatively very poor conductors of heats
• Have high density except for sodium and potassium. They can be cut with a knife as they have low density
• Metals form basic oxides like Magnesium oxide (MgO)

 

Physical properties of nonmetals:

• Solid at room temperature except for mercury
• Ductile (can be drawn into wires)
• Malleable (can be beaten into thin sheets)
• Sonorous (can produce sound)
• Lustrous (contain a natural shine)
• Have a high melting point except for cesium and gallium that have a very low melting point
• Generally good conductors of heat and electricity. While silver and copper are the best conductors of heat, lead and mercury are comparatively very poor conductors of heats
• Have high density except for sodium and potassium. They can be cut with a knife as they have low density
• Metals form basic oxides like Magnesium oxide (MgO)

What is Corrosion?

Corrosion is a natural process, which converts a refined metal to a more chemically stable form, such as its oxide, hydroxide, or sulphide. It is the gradual destruction of materials (usually metals) by chemical and/or electrochemical reaction with their environment.

 

CBSE Class 10 Science Chapter 3 Metals and Non-Metals Revision Notes PDF

 

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