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Metals and Non-Metals-Metals - Introduction
Materials Metals and Non-Metals-Metals - Introduction Video Lecture - Class 8
FAQs on Materials Metals and Non-Metals-Metals - Introduction Video Lecture - Class 8
| 1. What are the physical properties of metals? |  |
Ans. Metals have several physical properties such as high density, high melting and boiling points, good conductors of heat and electricity, malleability, and ductility. These properties make metals suitable for various applications in industries.
| 2. What are the physical properties of non-metals? | |
Ans. Non-metals have contrasting physical properties compared to metals. They generally have low density, low melting and boiling points, poor conductors of heat and electricity, brittle texture, and lack malleability and ductility. Non-metals are commonly found in the form of gases, liquids, or brittle solids.
| 3. How are metals and non-metals different in terms of chemical properties? | |
Ans. Metals have a tendency to lose electrons and form positive ions, while non-metals have a tendency to gain electrons and form negative ions. Metals generally react with oxygen to form metal oxides, while non-metals react with oxygen to form non-metallic oxides. Metals also tend to react with acids to produce salt and hydrogen gas, whereas non-metals do not react with acids.
| 4. Give examples of common metals and non-metals. | |
Ans. Common examples of metals include iron, copper, aluminum, gold, silver, and zinc. Non-metals include elements like carbon, oxygen, nitrogen, sulfur, phosphorus, and helium.
| 5. What are the uses of metals and non-metals? | |
Ans. Metals are widely used in various industries such as construction, transportation, electrical appliances, and manufacturing due to their properties like strength, conductivity, and durability. Non-metals find applications in industries like agriculture, medicine, electronics, and construction. For example, carbon is used in making graphite electrodes for steel production, while oxygen is essential for respiration in living organisms.
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Nov 15, 2024 Last updated |
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Metals and Non-Metals-Metals - Introduction for Class 82024 is part of Class 8 preparation. The notes and questions for Materials
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