Topics
Gravitation
- Concept of Gravitation
- Force and Motion
- Centripetal Force
- Kepler’s Laws
- Law of Orbit or Kepler's First Law
- Law of Areas or Kepler's Second Law
- Law of Periods or Kepler's Third Law
- Newton's Universal Law of Gravitation
- Uniform Circular Motion (UCM)
- Earth’s Gravitational Force
- Earth’s Gravitational Acceleration
- Mass and Weight
- Gravitational Waves
- Free Fall
- Gravitational Potential Energy
- Escape Velocity
- Weightlessness in Space
Periodic Classification of Elements
- Classification of Elements
- Dobereiner’s Triads
- Newland's Law of Octaves
- Mendeleev’s Periodic Table
- Insights into Mendeleev’s Periodic Table
- Modern Periodic Law
- The Modern Periodic Table
- Structure of the Modern Periodic Table
- Modern Periodic Table and Electronic Configuration of Elements
- Groups and Electronic Configuration
- Periods and Electronic Configuration
- Periodic Trends in the Modern Periodic Table
- Atomic Size
- Metallic and Non-metallic Characters
- Gradation in Halogen Family
Chemical Reactions and Equations
- Chemical Reaction
- Chemical Equations
- Balancing Chemical Equation
- Types of Chemical Reactions > Combination Reaction
- Types of Chemical Reactions > Decomposition Reaction
- Types of Chemical Reactions > Single Displacement Reaction
- Types of Chemical Reactions > Double Displacement Reaction
- Endothermic and Exothermic Processes
- Rate of Chemical Reaction
- Factors Affecting the Rate of a Chemical Reaction
- Chemical Properties of Carbon Compounds > Oxidation
- Chemical Properties of Carbon Compounds > Reduction
- Corrosion of Metals
- Rancidity
Effects of Electric Current
- Electric Circuit
- Heating Effect of Electric Current
- Magnetic Effect of Electric Current
- Right-hand Thumb Rule
- Applications of Biot-Savart's Law > Magnetic Field at the Centre of a Circular Loop
- Applications of Ampere’s Circuital Law > Magnetic Field of a Long Straight Solenoid
- Force on a Current Carrying Conductor in a Magnetic Field
- Fleming’s Left Hand Rule
- Electric Motor
- Electromagnetic Induction
- Galvanometer
- Faraday's Laws of Electromagnetic Induction
- Fleming’s Right Hand Rule
- Alternating current (AC) and Direct Current (DC)
- Electric Generator
Heat
Refraction of Light
Lenses
- Concept of Lenses
- Images Formed by Convex Lenses
- Images Formed by Concave Lenses
- Sign Convention
- Lens Formula
- Magnification
- Power of a Lens
- Combination of Lenses
- The Human Eye
- Defects of Vision and Their Corrections > Myopia
- Defects of Vision and Their Corrections > Hypermetropia
- Defects of Vision and Their Corrections > Presbyopia
- Apparent Size of an Object
- Use of Concave Lenses
- Use of Convex Lenses
- Persistence of Vision
Metallurgy
- Physical Properties of Metals
- Physical Properties of Non-metal
- Chemical Properties of Metal
- Reactions of Metals
- Reactivity Series of Metals
- Chemical Properties of Non-metal
- Ionic Compounds
- Metallurgy
- Basic Principles of Metallurgy > Concentration of Ores
- Basic Principles of Metallurgy > Extraction of Metals
- Basic Principles of Metallurgy > Refining of Metals
- Corrosion of Metals
- Prevention of Corrosion
Carbon Compounds
- Bonds in Carbon Compounds
- Carbon: A Versatile Element
- Hydrocarbons
- Straight chains, Branched chains, and Rings of Carbon atoms
- Functional Groups in Carbon Compounds
- Homologous Series
- Nomenclature
- Chemical Properties of Carbon Compounds > Combustion
- Chemical Properties of Carbon Compounds > Oxidation
- Chemical Properties of Carbon Compounds > Addition Reaction
- Chemical Properties of Carbon Compounds > Substitution Reaction
- Ethanol
- Ethanoic Acid
- Macromolecules and Polymers
Space Missions
School of Elements
The Magic of Chemical Reactions
- Chemical Equations
- Types of Chemical Reactions > Combination Reaction
- Types of Chemical Reactions > Decomposition Reaction
- Types of Chemical Reactions > Single Displacement Reaction
- Types of Chemical Reactions > Double Displacement Reaction
- Chemical Properties of Carbon Compounds > Oxidation
- Types of Double Displacement: Neutralization Reaction
The Acid Base Chemistry
- Properties of Acids > Physical Properties
- The pH Scale
- Acids, Bases and Their Reactivity
- Acid or a Base in a Water Solution
- Preparation and Uses of Baking Soda
- Preparation and Uses of Bleaching Powder
- Preparation and Uses of Washing Soda
- Preparation and Uses of Plaster of Paris
- Chemicals from Common Salt - Soap as a Salt
The Electric Spark
All about Electromagnetism
- Magnetic force
- The Bar Magnet
- Right-hand Thumb Rule
- Applications of Biot-Savart's Law > Magnetic Field at the Centre of a Circular Loop
- Applications of Ampere’s Circuital Law > Magnetic Field of a Long Straight Solenoid
- Force on a Current Carrying Conductor in a Magnetic Field
- Electric Motor
- Electromagnetic Induction
- A.C. Generator
- Simple D.C. Motor
- Household Electrical Circuits
Wonders of Light 1
Wonders of Light 2
Striving for better Environment 1
- Abatement of Pollution
- Sustainable Use of Resources
- Key Points: Structure of the Modern Periodic Table
Maharashtra State Board: Class 10
Key Points: Structure of the Modern Periodic Table
- The modern periodic table has 7 periods, 18 groups, and 118 elements.
- It has 4 blocks: s, p, d, and f (with d-block as transition elements).
- A zig-zag line separates metals, metalloids, and nonmetals.
Maharashtra State Board: Class 10
Structure of the Modern Periodic Table
The modern periodic table is a tabular arrangement of elements based on their atomic numbers, highlighting periodic trends in their properties.
Features of the Modern Periodic Table:
- 18 vertical columns (called groups) arranged from left to right.
- 7 horizontal rows (called periods).
- Each box in the table represents an element, with its atomic number indicated at the top.
- The table contains a total of 118 elements, including the lanthanide and actinide series.
Classification of Elements:
- Main group elements: Groups 1, 2, 13-17.
- Transition elements: Groups 3-12.
- Noble gases (inert gases): Group 18 (outermost shell completely filled, making them non-reactive).
Periodic Trends:
- The number of shells in an atom determines its period number.
- Period 1 contains only 2 elements (the shortest period).
- Periods 2 and 3 contain 8 elements each (short periods).
- Periods 4 and 5 contain 18 elements each (long periods).
- Period 6 (Group 3) contains lanthanides (rare earth elements).
- Period 7 (Group 3) contains actinides (radioactive elements).
The modern periodic table is divided into four blocks:
- s-block: Groups 1 and 2.
- p-block: Groups 13 to 18.
- d-block: Groups 3 to 12 (transition elements).
- f-block: Lanthanide and Actinide series (placed separately at the bottom).
Metals, Nonmetals, and Metalloids:
- A zigzag line in the p-block separates metals, nonmetals, and metalloids.
- Metalloids lie along the border of this zigzag line.
- Metals are positioned to the left of the line.
- Nonmetals are positioned to the right of the line.
| Group Number | Group Name | Properties |
| Group 1 (IA) | Alkali Metals | React with water to form strong alkalis. |
| Group 2 (IIA) | Alkaline Earth Metals | Form alkalis, but weaker compared to Group 1 elements. |
| Group 13 (IIIA) | Boron Family | Boron is the first element in this group. |
| Group 14 (IVA) | Carbon Family | Carbon is the first element in this group. |
| Group 15 (VA) | Nitrogen Family | Contains both nonmetals and metalloids. |
| Group 16 (VIA) | Oxygen Family | Also known as chalcogens. |
| Group 17 (VIIA) | Halogen Family | Elements in this group form salts. |
| Group 18 | Noble Gases (Zero Group) | These gases are inert under normal conditions. |
Related QuestionsVIEW ALL [31]
Match the columns:
| Column ‘A’ | Column ‘B’ |
| Manganese | (a) Metal |
| (b) Non-metal | |
| (c) Transition metal |
