Choose any topic from the index. Read its explanation, learn its uses, listen to the audio narration, and practise the important question and answer.
Audio uses your browser's speech synthesis. Available voices and pronunciation depend on your device.
🗂️ Clickable Index
Groups 1–8
Groups 9–18
Inner Transition Series
Welcome to the Periodic Table!
Select any group from the index above to begin your learning journey.
The modern periodic table contains 18 groups and 7 periods. Lanthanides and actinides are commonly shown in two separate rows below the main table.
🎯 Quick Revision
Important Question:
Why do elements in the same group generally have similar chemical properties?
Answer: Elements in the same group generally have similar outer-shell electron configurations. For main-group elements, they have the same number of valence electrons, which strongly influences their chemical properties.
Audio uses your browser's speech synthesis. An English (India)
voice is preferred if available on your device.
Educational note: Uses listed here are examples, not instructions for
handling chemicals. Some compounds are hazardous and require trained
supervision.
Discover the hidden science behind the objects we use every day!
Learn the working principle, explore real-life applications and listen to explanations in English.
Prepared for curious learners by Ready to Learn Hub
🎧 Audio Learning Centre
Select an object and press Listen to hear its explanation. The narration uses your browser's speech synthesis. An Indian English voice is selected when available.
Speed: Slow
Ready to learn!
📚 Interactive Index
Choose a topic to jump to its explanation. Use the search box to find an object quickly.
A Colourful Educational Calendar for Students, Teachers and Curious Minds
Explore important days, discover scientific achievements and understand their importance to our world.
🌟 Why Do We Celebrate International Days?
International days draw attention to important ideas, discoveries and challenges. They encourage people to learn, share knowledge, work together and take action. Science days inspire curiosity; mathematics days show how numbers, patterns and logical thinking help us understand the world.
Schools can celebrate these occasions through experiments, quizzes, mathematics puzzles, science exhibitions, speeches, projects and classroom discussions.
🎧 Listen to the Introduction
Listen to an introduction in English. Choose an Indian English voice if your browser or device provides one.
📖 Clickable Index of Important Days
Select any day to jump to its description. Use the search box or category filter to find a topic.
🎙️ Audio Learning Centre
Select a day below to listen to its narration.
Audio uses your browser's speech synthesis. Available voices and accent depend on your device. Internet access is not normally needed for built-in voices.
🌈 Explore Each Day and Its Importance
🧑🔬 Ideas for School Celebrations
Organise a mathematics quiz on Pi Day.
Demonstrate a simple experiment on National Science Day in India.
Build a model rocket or a solar system display during World Space Week.
Arrange a light and colour demonstration for the International Day of Light.
Conduct a coding challenge and introduce algorithms.
Plant native trees and discuss biodiversity on World Environment Day.
Ask students to prepare posters about scientists, mathematicians and inventors.
Encourage girls and boys equally to participate in STEM activities.
📌 Important Note About Dates
This calendar includes official international observances, selected national observances and popular educational celebrations. These are not all the same status. Some dates, such as World Space Week, cover several days. The themes of certain observances change each year. Always check the relevant official organisation for current-year themes and events.
In India, National Science Day is celebrated on 28 February to commemorate C. V. Raman's discovery of the Raman Effect. Pi Day and the International Day of Mathematics are both observed on 14 March.
