Learning objectives What is matter? Particle model: core ideas Differences between states of matter Solids Liquids Gases Beyond the basics Change of state Evaporation vs boiling Factors increasing evaporation: Effect of temperature and pressure Everyday applications and examples Common misconceptions Quick check questions Revision table Property Solid Liquid Gas Shape Fixed Not fixed (takes container’s […]
Physical change alters only the form, size, or state of a substance without forming a new substance, whereas chemical change produces one or more new substances with different properties. This article is suitable for students in Classes 7–10. It explains the difference between physical and chemical change with clear definitions, tests, and everyday examples, making
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Molar Mass: Explained Notes for Students What is Molar Mass? How to Calculate Molar Mass (Step-by-Step) Examples Example 1: Silver (Ag) Example 2: Chlorine (Cl) Example 3: Sodium Sulfate $(Na_2SO_4)$ Example 4: Urea $(CO(NH_2)_2)$ Summary Tips for Students For more information visit: Mole Concept
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what is olfactory indicator? Olfactory indicators are natural substances that can detect acidic or basic solutions based on changes in their characteristic smell or odor. These indicators work by having different odors in acidic and basic media, making them useful for identifying the nature of unknown solutions without using traditional color-changing indicators. Also Read: Activity
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Quantum number is an important concept for understanding the structure of atom. Here get a free quantum number worksheet on Quantum number to excel in the examination. You may also want to look at our post on Quantum Numbers Chart. Quantum Numbers Practice Problems Worksheet Question 1. What is the total number of orbitals associated
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There are four Quantum Numbers for the each electron in the atom. In this post we will see how to find Quantum Numbers for the electrons in an atom or elements In order to find the Quantum numbers, we need to consider two things. a. Quantum number range and meaning b.How the electrons are distributed
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Quantum numbers are numerical values that describe the properties of atomic orbitals and the electrons in those orbitals. They are essential for understanding the arrangement of electrons in atoms and the resulting chemical behavior of elements. There are four primary quantum numbers: principal (n), azimuthal (l), magnetic ($m_l$), and spin ($m_s$). Here is the chart
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Here is CBSE class 12 Chemistry Syllabus 2024-2025 CLASS XII (THEORY) (Total Periods 110) Unit II: Solutions (10 Periods)Types of solutions, expression of concentration of solutions of solids in liquids, solubility of gases in liquids, solid solutions, Raoult’s law, colligative properties – relative lowering of vapour pressure, elevation of boiling point, depression of freezing point,
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