UNIBOARDHUB is an India's Largest Directory of Boards & Universities
Atomic History Element Basics Element Hacks
If you feel lost while looking at the periodic table, it’s normal - almost every student feels this at the start.
Let’s break it down, step by step - starting from the historical roots and moving towards the modern table.
Before any table existed, scientists simply discovered elements and listed them. But that was chaotic.
By the early 1800s, about 63 elements were known. There was no structure, just a list.
Chemists asked:
This question led to many early attempts at organizing elements.
Enter Dmitri Mendeleev, a Russian chemist.
Mendeleev created a periodic table based on atomic mass and chemical properties.
He arranged the known elements in rows and grouped them based on similar properties - but here's the genius part - he left gaps for elements that hadn’t been discovered yet.
Example:
This showed that the periodic table wasn’t just a classification tool - it could predict the future of chemistry.
Download free notes and practice questions from our Resource Page to practice daily
Class 10 - Free Practice Resources
| Category | Resource Type | Description | Action |
|---|---|---|---|
| Practice | Unsolved Question Paper | Practice with Class 10 unsolved question papers based on the latest CBSE exam pattern to build confidence. | Download Now |
| Practice | Solved Question Paper | Learn faster with detailed step-by-step solutions prepared specially for Class 10 students. | Download Now |
| Practice | Worksheet | Strengthen every chapter using daily practice worksheets designed for the Class 10 syllabus. | Download Now |
| Explore | Study Resources | Access free Class 10 notes, formula sheets, revision material, and concept-wise guides. | Explore Now |
Class 11 - Free Practice Resources
| Category | Resource Type | Description | Action |
|---|---|---|---|
| Practice | Unsolved Question Paper | Improve your problem-solving skills with our latest unsolved question papers designed as per CBSE exam pattern. | Download Now |
| Practice | Solved Question Paper | Learn smart solving methods with step-by-step solutions explained clearly by subject experts. | Download Now |
| Practice | Worksheet | Strengthen concepts with daily practice worksheets including important exam-oriented questions. | Download Now |
| Explore | Study Resources | Access free notes, formula sheets, revision guides and concept boosters to prepare more effectively. | Explore Now |
As revolutionary as Mendeleev’s table was, it had problems:
The breakthrough came with Henry Moseley in 1913. He discovered that the identity of an element is defined by its atomic number (number of protons), not its mass.
Once the table was reorganized by atomic number:
Today’s periodic table is based on increasing atomic number and is structured into:
Periods (Rows)
Groups (Columns)
Blocks
The table is also split into s-block, p-block, d-block, and f-block based on electron configuration.
Example:
The table helps predict how elements behave, thanks to periodic trends like:
Think of elements like students and lockers:
So, when you know one student’s behavior, you can guess others in that group - same with elements!
In Exams:
In Real Life:
Understanding the periodic table is like learning to read a map. Once you understand how it’s organized and why, it stops being confusing and starts being useful.
From Mendeleev’s predictions to Moseley’s corrections, the periodic table has evolved to become the most powerful tool in chemistry. Instead of memorizing it, understand the story behind it - and the patterns will make sense.
If you want to practice this topic, you can take a quiz in Curious Corner for better practice.
*Note: You must register yourself to access the quizzes.*
Boost your learning with a wide range of resources, including exam guides, recommended tools, and study materials tailored to your needs. Access everything you need to excel in your academic journey.
Join the uniboardhub community and get the latest updates on educational courses, insightful resources, and academic tips to enhance your learning journey.
Post a Comment