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Questions and Answers
Metals have low electrical and thermal conductivity.
Metals have low electrical and thermal conductivity.
False
Non-metals are generally lustrous and malleable.
Non-metals are generally lustrous and malleable.
False
Metals form negative ions by gaining electrons.
Metals form negative ions by gaining electrons.
False
Examples of metals include Aluminum, Gold, and Nitrogen.
Examples of metals include Aluminum, Gold, and Nitrogen.
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Non-metals are widely used in industries and construction.
Non-metals are widely used in industries and construction.
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Metals and non-metals can form both ionic and covalent compounds.
Metals and non-metals can form both ionic and covalent compounds.
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Ionic compounds are generally conductive, while covalent compounds are non-conductive.
Ionic compounds are generally conductive, while covalent compounds are non-conductive.
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Metals are generally poor conductors of electricity and heat.
Metals are generally poor conductors of electricity and heat.
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Non-metals are malleable and ductile like metals.
Non-metals are malleable and ductile like metals.
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Metals react with acids to form hydrogen gas, unlike non-metals.
Metals react with acids to form hydrogen gas, unlike non-metals.
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Study Notes
Class 10th Science 2: Exploring Metals and Non-Metals
As you continue your journey through the world of science, let's dive into the fascinating realm of metals and non-metals — two fundamental classes of elements. These elements play a vital role in our daily lives, from our kitchens to the technology we use.
Metals
Metals are lustrous, malleable, and ductile elements. They have a high electrical and thermal conductivity, and they are generally good conductors of heat and electricity. Some examples of metals include:
- Aluminum
- Iron
- Copper
- Gold
- Silver
Metals form positive ions by losing electrons, which leads to their ability to conduct electricity. Metals also form ionic bonds with non-metal elements, resulting in compounds such as sodium chloride (NaCl) or iron sulfide (FeS).
Metals are widely used in industries, engineering, and everyday life. For instance, metals like aluminum and steel are commonly used in building and construction, while copper and silver are used in electrical wiring and electronics.
Non-Metals
Non-metals, on the other hand, are generally poor conductors of heat and electricity. They are not lustrous, and they are brittle and non-malleable. Non-metals include:
- Carbon (in the form of graphite and diamond)
- Hydrogen
- Oxygen
- Nitrogen
- Chlorine
Non-metals form negative ions by gaining electrons, which leads to their ability to conduct electricity, albeit weakly, in the form of ionic compounds.
Non-metals are also crucial in many applications. For example, carbon is used in pencils and is a constituent of organic compounds essential to life. Hydrogen is used in hydrogen fuel cells for energy production, and oxygen is vital for breathing and combustion.
Metal and Non-Metal Compounds
Metals and non-metals can form ionic and covalent compounds. In ionic compounds, metals and non-metals form ions by gaining or losing electrons, resulting in an electrostatic attraction between the oppositely charged ions. Examples of ionic compounds include sodium chloride (NaCl) and magnesium oxide (MgO).
In covalent compounds, electrons are shared between metal and non-metal atoms. Covalent compounds are generally non-conductive and are not as common as ionic compounds in everyday life. Examples of covalent compounds include methane (CH₄) and water (H₂O).
Exploring and Testing Metals and Non-Metals
To distinguish between metals and non-metals, perform the following tests:
- Luster: Metals are lustrous, while non-metals are generally not.
- Conductivity: Metals are good conductors of heat and electricity, while non-metals are poor conductors.
- Malleability and Ductility: Metals are malleable and ductile, while non-metals are not.
- Reaction with acids: Metals generally displace hydrogen from acids, resulting in the formation of hydrogen gas. Non-metals do not react with acids in this way.
Understanding the properties and behaviors of metals and non-metals lays the foundation for exploring the vast realm of chemistry and its application in our daily lives. From building skyscrapers to powering computers, metals and non-metals are essential elements that form the basis of our modern world.
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Description
Dive deep into the world of metals and non-metals, fundamental elements with diverse properties and applications. Learn about their characteristics, conductivities, and reactions to acids, and explore how they form compounds essential for various industries and daily life applications.
