Earth science class 10th chapter 3 notes in english, Study notes of Earth science

Download Earth science class 10th chapter 3 notes in english and more Study notes Earth science in PDF only on Docsity! CBSE Class 10 Science Notes Chapter 3 Metals and Non Metals PDF Download CBSE Class 10 Science Notes Chapter 3 Metals and Non-metals aims to help students understand concepts easily. Quick revision notes are also available for Chapter 3 - Metals and Non-metals to aid in exam preparation. CBSE Class 10 Science Notes Chapter 3: As students of Class 10, you all might be gearing up for your first board exams now. While the syllabus might seem overwhelming with so much to learn in subjects like Science, staying organized is key to performing your best. This study resource aims to help you do just that by providing a comprehensive set of notes for Chapter 3 - Metals and Non Metals from your Science textbook. In this chapter, you will be introduced to the fundamental properties of metals and nonmetals along with various interesting reactions that help distinguish one from the other. Our carefully crafted notes have been designed for easy reading and reference so you can grasp even the most complex concepts with clarity and focus on preparing thoroughly. So go ahead, download the PDF and get revising efficiently for your exams with this essential study aid! CBSE Class 10 Science Notes Chapter 3 Overview Understanding the basic concepts of atoms and molecules, and then explore the different states of matter and their properties. Delve into the topic of chemical reactions and equations, focusing on balancing equations and types of chemical reactions. Lastly, learn about acids, bases, indicators, and pH scale which are important topics for Class 10 Science exams. However, our learning does not end here. As students, it is important to constantly strive for improvement and excellence in our academics. For those seeking additional guidance and resources to ace their exams, I would highly recommend Physics Wallah notes. These notes are not only comprehensive but they are also written in a simple language by expert teachers who have years of experience in teaching CBSE Class 10 Science. With Physics Wallah notes by your side, you can be fully prepared to tackle any question that comes your way. So keep studying with dedication and remember to take regular breaks to rejuvenate your mind. And remember, when it comes to finding the best study materials for Class 10 Science, there is no match for Physics Wallah notes! CBSE Class 10 Science Notes Chapter 3 Here are notes for each main topic in CBSE Class 10 Science Chapter 3: "Metals and Non-Metals": 1) Introduction to Metals and Non-Metals: Definition: Metals and non-metals are two broad categories of elements in the periodic table. These categories are based on the characteristic properties that differentiate the elements. Characteristics of Metals: Metals generally exhibit the following properties: ● Luster:Metals have a shiny appearance. ● Conductivity: They conduct heat and electricity. ● Malleability:Metals can be hammered into thin sheets. ● Ductility: They can be drawn into thin wires. Characteristics of Non-Metals: Non-metals exhibit characteristics opposite to metals: ● Dull Appearance: Non-metals lack a shiny appearance. ● Poor Conductors: They are generally poor conductors of heat and electricity. ● Brittle: Non-metals are usually not malleable or ductile. 2) Physical Properties of Metals: Malleability: Malleability is the property of a material to withstand deformation under compressive stress. In the context of metals, it refers to their ability to be hammered or rolled into thin sheets without breaking. Ductility: Ductility is the property of a material to undergo significant plastic deformation before rupture or breaking. In metals, it refers to their ability to be drawn into thin wires. Conductivity: Metals are good conductors of both heat and electricity due to the presence of free electrons that can move freely. Luster: 10) Physical and Chemical Properties of Non-Metals: Physical Properties: ● Dull appearance. ● Poor conductors of heat and electricity. ● Can exist in different states (solid, liquid, gas). Chemical Properties: ● React with oxygen to form non-metal oxides. ● React with acids to produce gases. Uses of Non-Metals: ● Oxygen for respiration. ● Nitrogen in fertilizers. ● Carbon as the basis of organic compounds and fuels. 11) Metalloids: Definition: Metalloids are elements that exhibit properties of both metals and non-metals. Examples: Silicon (Si), Germanium (Ge) Properties: Metalloids may have intermediate conductivity and other characteristics between metals and non-metals. 12) Comparison Between Metals and Non-Metals: Differentiating Factors: ● Physical appearance (shiny vs. dull). ● Conductivity (good vs. poor). ● Malleability and ductility (present vs. absent). 13) Significance of the Periodic Table: Arrangement: Metals, non-metals, and metalloids are distributed across the periodic table. Understanding their placement aids in predicting their properties and behaviors. These comprehensive notes covers each topic in Chapter 3 of Class 10 Science, providing a detailed understanding of metals and non-metals and their various properties and applications. CBSE Class 10 Science Notes Chapter 3 PDF Understanding the properties and uses of metals and non-metals is crucial for the CBSE Class 10 Science exam. We have covered various topics such as physical and chemical properties, reactivity series, and extraction of metals in this blog post. It is important to note that while these concepts may seem overwhelming at first, with dedication and proper guidance, anyone can master them. And speaking of guidance, we cannot stress enough the importance of using reliable study materials like the Physics Wallah notes. These notes provide a comprehensive explanation of all topics in an easy-to-understand language along with helpful illustrations and diagrams. So why settle for average notes when you can have the best? As a compassionate blogger, we urge all CBSE Class 10 students to download the Physics Wallah notes for Science Chapter 3 Metals and Non-Metals and give their studies a boost. Remember, hard work coupled with the right resources will surely lead to success! CBSE Class 10 Science Notes Chapter 3 Important Questions Here are some important questions for CBSE Class 10 Science Chapter 3: "Metals and Non-Metals": 1. Define malleability and ductility. Provide examples of metals that exhibit these properties. Answer: ● Malleability: Malleability is the property of a material that allows it to be hammered or rolled into thin sheets without breaking. For example, gold and aluminum exhibit high malleability. ● Ductility: Ductility is the property of a material that allows it to be drawn into thin wires. Examples of metals with high ductility include copper and silver. 2. Explain the term 'reactivity series' and arrange the metals potassium, sodium, calcium, and iron in decreasing order of reactivity. Answer: The reactivity series is a list of metals arranged in decreasing order of their reactivity towards other substances. The order for the given metals is: Potassium (K)>Sodium (Na)>Calcium (Ca)>Iron (Fe)Potassium (K)>Sodium (Na)>Calcium (Ca)>Iron (Fe) 3. Describe the reaction of metals with oxygen, giving examples of metal oxides formed. Answer: Metals react with oxygen to form metal oxides. For example, the reaction of iron with oxygen results in the formation of iron oxide: 4Fe+3O2→2Fe2O34Fe+3O2 →2Fe2 O3 4. Describe the properties of ionic compounds and their behavior in the molten state. Answer: Ionic compounds have high melting and boiling points, conduct electricity in the molten state, and often have a crystalline structure. As an illustration, ionic compounds like NaCl do not exhibit conductivity in their solid state. However, when these compounds are dissolved in water or in a molten state, they become capable of conducting electricity. 5. State the general equation for the reaction of a metal with dilute hydrochloric acid. Give an example of a metal that reacts vigorously with dilute hydrochloric acid. Answer: The general equation for the reaction of a metal with dilute hydrochloric acid is: Metal+2HCl→Metal chloride+Hydrogen gasMetal+2HCl→Metal chloride+Hydrogen gas An example of a metal that reacts vigorously with dilute hydrochloric acid is zinc. 6. Explain why sodium and potassium are stored in kerosene oil. 20. How do metals react with water? Provide examples. Answer: Metals react with water to form metal hydroxides and hydrogen gas. For example, sodium reacts violently with water to produce sodium hydroxide and hydrogen gas: 2Na+2H2O→2NaOH+H22Na+2H2 O→2NaOH+H2 CBSE Class 10 Science Notes Chapter 3 Extra Questions Here are some extra questions for CBSE Class 10 Science Chapter 3: "Metals and Non-Metals": 1. Describe the formation of ionic compounds between metals and non-metals with a suitable example. Answer: Ionic compounds are formed through the transfer of electrons between metals and non-metals, resulting in the formation of positively and negatively charged ions. One example is the formation of sodium chloride (NaCl): 1. Sodium (Na): Sodium is a metal that readily loses one electron to achieve a stable electron configuration. Na→Na++e− 2. Chlorine (Cl): Chlorine is a non-metal that readily gains one electron to achieve a stable electron configuration. Cl+e−→Cl− 3. Combining Ions: The positively charged sodium ion (Na^+) and negatively charged chloride ion (Cl^-) attract each other due to electrostatic forces, forming the ionic compound sodium chloride (NaCl). Na++Cl−→NaCl 2. How are alloys different from pure metals in terms of properties and applications? Answer: Alloys are mixtures of two or more elements, with at least one element being a metal. They differ from pure metals in the following ways: ● Properties: ● Alloys often exhibit enhanced properties compared to pure metals, such as increased strength, hardness, and resistance to corrosion. ● Pure metals may be softer and more susceptible to corrosion. ● Composition: ● Pure metals consist of only one type of metal atom. ● Alloys consist of a combination of different types of atoms, often including metals and non-metals. ● Melting Point: ● Alloys may have different melting points compared to pure metals, sometimes higher or lower depending on the specific alloy. ● Applications: ● Alloys are widely used in various applications where specific properties are required, such as in the automotive industry (e.g., steel), aerospace industry, and construction. ● Pure metals are used when certain properties like conductivity or malleability are crucial, such as in electrical wiring (copper) or jewelry (gold). 3. Why are some metals stored in kerosene oil? Provide examples. Answer: Some metals are stored in kerosene oil to prevent their reaction with atmospheric oxygen and moisture, which can lead to corrosion. Examples include: ● Sodium (Na): Sodium is a highly reactive metal that reacts vigorously with oxygen and moisture in the air. Storing sodium in kerosene oil prevents its immediate reaction with these elements. ● Potassium (K): Similar to sodium, potassium is a highly reactive metal that can react with atmospheric moisture and oxygen. Storing potassium in kerosene oil prevents rapid oxidation. 4. Explain the process of rusting in iron. How does it affect the metal? Answer: Rusting is the corrosion of iron in the presence of oxygen and water. The process involves the following steps: 1. Formation of Iron Oxide: Iron reacts with oxygen (from the air) and water to form iron oxide (rust). 2. 4Fe+3O2+6H2O→4Fe(OH)34Fe+3O2 +6H2 O→4Fe(OH)3 3. Formation of Rust: The initial product undergoes further oxidation to form hydrated iron(III) oxide, commonly known as rust (Fe2O3·xH2O). Effects of Rusting on Iron: ● Weakening: Rust is a porous and flaky material that does not adhere well to the iron surface. This weakens the iron structure over time. ● Disintegration: The expansion of rust can lead to the disintegration of iron structures, causing damage. ● Reduced Strength: The presence of rust reduces the structural integrity and strength of iron. 5. Discuss the importance of the periodic table in understanding the properties of elements. Answer: The periodic table is a crucial tool in understanding the properties of elements for the following reasons: ● Organization: The periodic table organizes elements based on their atomic number, electron configuration, and chemical properties. This organization allows for a systematic study of elements. ● Prediction of Properties: Elements in the same group (vertical column) often exhibit similar chemical properties. The periodic table allows scientists to predict the properties of elements based on their location. ● Identification of Trends: Trends in properties, such as atomic size, electronegativity, and reactivity, can be identified by observing elements across periods (horizontal rows) and down groups. ● Valuable Information: The periodic table provides essential information about each element, including its symbol, atomic number, atomic mass, and electron configuration. ● Basis for Chemical Reactions: Understanding the arrangement of elements in the periodic table is fundamental for predicting and explaining chemical reactions. It helps in identifying trends in reactivity and the formation of compounds.