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General physical properties of metal - Class 8 PDF Download
1. Metals have high specific gravity, high opacity and refractivity to Light and have luster.
2. Metals can hammered into thin sheet and drawn into wires, so they are mostly malleable and ductile .
3. They are good conductor of heat and electricity.
4. Metals are mostly sonorous and produce sound when they struck .
5. All metal are solid at room temperature except mercury which is liquid
6. Most metal have high melting point and are highly tensile. Tungsten has high tensile strength.
2. Metals can hammered into thin sheet and drawn into wires, so they are mostly malleable and ductile .
3. They are good conductor of heat and electricity.
4. Metals are mostly sonorous and produce sound when they struck .
5. All metal are solid at room temperature except mercury which is liquid
6. Most metal have high melting point and are highly tensile. Tungsten has high tensile strength.
FAQs on General physical properties of metal - Class 8
| 1. What are the general physical properties of metals? |  |
Ans. Metals have several general physical properties, including high conductivity, malleability, ductility, opacity, and high melting and boiling points. They are also generally dense and have a metallic luster.
| 2. Why are metals good conductors of electricity? | |
Ans. Metals are good conductors of electricity because they have free electrons that can move easily within the metal's structure. These free electrons create a flow of electric current when a voltage is applied, making metals excellent conductors.
| 3. What is the significance of malleability in metals? | |
Ans. Malleability is the property of metals that allows them to be hammered or rolled into thin sheets without breaking or cracking. This property is significant because it enables metals to be easily shaped and formed into various objects and structures.
| 4. Can you explain the term "ductility" in relation to metals? | |
Ans. Ductility refers to the ability of metals to be drawn into thin wires without breaking. This property is important for applications such as electrical wiring, where metals like copper or aluminum need to be stretched into long, thin wires.
| 5. Why do metals have high melting and boiling points? | |
Ans. Metals have high melting and boiling points due to the strong metallic bonds between the atoms or ions in their structure. These bonds require a significant amount of energy to break, resulting in high temperatures needed to melt or boil metals.
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Nov 15, 2024 Last updated |
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