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Chemistry Atomic Structure JEE Mains Notes 2025

JEE Main

Revision Notes

Chemistry

Atomic Structure

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Chemistry Atomic Structure JEE Mains Notes PDF - FREE Download

Vedantu gives you special JEE Main Atomic Structure Notes with important topics to help you score well in JEE Main 2025. These notes cover all essential concepts, including atomic models, subatomic particles, quantum numbers, and electronic configurations, making it easier for students to understand complex ideas. Prepared by Master teachers, this resource is designed for JEE Mains, focusing on important formulas, explanations, and tips to support quick revisions. You can easily get the Atomic Structure JEE Mains Notes PDF on Vedantu’s website. The most important feature of these notes is that they make concepts simple and have important ideas and theories in a short form.

Table of Content

1. Year-Wise Weightage of Atomic Structure JEE Main Notes

2. Atomic Structure JEE Main 2025: Important Topics

3. Do Not Miss these Below Tables

3.1

Subatomic Particles Table

3.2

Atomic Terms

4. Learn with Atomic Structure Notes and Score High in JEE Main 2025

5. JEE Main 2025 Atomic Structure: Notes vs Formulas

6. How Can Atomic Structure Notes For JEE Mains Guide Your IIT Journey?

7. Check Other Important Links for JEE Main 2025 Atomic Structure

8. JEE Chemistry Notes: Explore Chapters with 2025 Links

9. Score Higher by Using Vedantu’s JEE Main Notes for Preparation

10. Download Subject-wise Notes for JEE Main

11. Important Study Materials Links for JEE Exams

FAQs

Year-Wise Weightage of Atomic Structure JEE Main Notes

Students must consider the Atomic Structure JEE Mains Notes PDF as a crucial resource because this chapter explains the fundamental building blocks of matter, delving into the structure of atoms and their components. It covers topics like subatomic particles, electron configuration, and the arrangement of elements in the periodic table. You can understand the significance of Atomic Structure in JEE Main by checking the information in the table provided below.

Year Wise Weightage of Questions: JEE Main Atomic Structure
S.No.	Year	Average No. Of Questions Asked	Marks per Question	Total Marks
1.	2024	2	4	8
2.	2023	4	4	16
3.	2022	3	4	12
4.	2021	3	4	12
5.	2020	4	4	16

To achieve your goals, prepare for your JEE Main exam 2025 with Vedantu’s Atomic Structure Notes PDF and JEE Main Chemistry Syllabus 2025.

Atomic Structure JEE Main 2025: Important Topics

Here are a few Important topics students should consider when learning the Atomic Structure chapter. These subjects are selected from previous years' JEE Main exams. Therefore, before you get the Revision notes, review this list of significant topics from Atomic Structure.

Bohr Model of the Atom
Quantum Mechanical Model of the Atom
Wave Nature of Electrons
Atomic Spectra
Ionization Energy

Do Not Miss these Below Tables

Check the tables below where you get the most important contents that you should not miss while preparing for JEE Main 2025.

Subatomic Particles Table

Property	Electron	Proton	Neutron
Symbol	e-	p	n
Approximate relative mass	1/1836	1	1
Mass in kg	9.109×10^-31	1.673×10^-27	1.675×10^-27
Mass in amu	5.485×10^-4	1.007	1.008
Charge (coulomb)	1.602×10^-19	1.602×10^-19	0
Actual Charge (e.s.u)	4.8 × 10^-10	4.8 × 10^-10	0

Atomic Terms

Terms	Definition / Explanation
Atomic Number (Z)	Number of protons or electrons of neutral atom.
Mass Number (A)	Total number of protons and neutrons in an atom.
Nucleons	Protons and neutrons are present in a nucleus. So, these fundamental particles are collectively known as nucleons.
Isotopes	Atoms of the element with same atomic number but different mass number e.g. ¹H¹, ¹H², ¹H³.
Isobars	Atoms having the same mass number but different atomic numbers, e.g. ¹⁵P³² and ¹⁶S³².
Isotones	Atoms having the same number of neutrons but different number of protons or mass number, e.g. ⁶C¹⁴, ⁸O¹⁶, ⁷N¹⁵.
Isoelectronic	Atoms, molecules or ions having same number of electrons e.g. N₂, CO, CN⁻.
Nuclear isomers	Atoms with the same atomic number and same mass number but with different radioactive properties. Example of nuclear isomers is Uranium –X (half-life 1.4 min) and Uranium –Z (half-life 6.7 hours).
Isosters	Molecules having same number of atoms and also same number of electrons are called isosters. E.g., N₂ and CO.

Learn with Atomic Structure Notes and Score High in JEE Main 2025

Atomic Structure is the field of study of the structure of atoms. It deals with the atom’s composition, size, shape, and energy levels. The weightage of Atomic Structure in JEE Main is around 6-8%. This means that there are typically 3-4 questions asked from this chapter in the exam.

Students can also expect direct questions from this section, which makes it one of the scoring topics. Here are the few points that make the chapter high weightage.

Essential Building Blocks: The atomic structure chapter is prominent in the JEE Main syllabus because it is the foundational basis for understanding chemistry.
Fundamental Nature: This chapter explores the intricate details of atoms, the basic constituents of matter, which are essential to comprehending chemical behaviour.
Periodic Table Insights: Understanding atomic structure unlocks the periodic table's secrets, elucidating elements' trends and properties based on their electron configurations.
Chemical Bonding Blueprint: The arrangement of electrons, influenced by atomic structure, governs how atoms combine to form molecules, laying the groundwork for grasping chemical bonding.
Electron Configuration Impact: The configuration of electrons in atoms affects an element's reactivity, valence electrons, and bonding potential, making it a crucial concept in chemical interactions.
Quantum Mechanics Gateway: The atomic structure chapter introduces the fundamentals of quantum mechanics, which play a role in explaining electron behaviour, energy levels, and electronic transitions.
Spectral Interpretation: A solid grasp of atomic structure aids in interpreting spectral lines, allowing for the identification of elements and their presence in various substances.
Stoichiometric Precision: Accurate atomic masses, stemming from atomic structure knowledge, are pivotal for precise stoichiometric calculations in chemical reactions.
Bridging Concept: The insights gained from atomic structure extend to other areas of chemistry, forming a bridge to topics like molecular geometry and spectroscopy.
Foundation for Advanced Concepts: Concepts learned in this chapter serve as a foundation for more intricate topics, enabling a deeper understanding of chemical phenomena.
Practical Significance: The knowledge of atomic structure finds practical application in predicting chemical behaviour, explaining periodic trends, and making informed decisions in various chemical scenarios.
Holistic Chemical Understanding: Mastering the atomic structure chapter provides a holistic understanding of the fundamental principles that govern chemical interactions and reactions.

JEE Main 2025 Atomic Structure: Notes vs Formulas

JEE Main formulas are like the building blocks of success in the exam, and when combined with well-structured revision notes, they become an indispensable tool for comprehensive understanding. As you revise your JEE Main notes, incorporate the associated formulas. Understand the 'why' behind the formula by referring to the notes, then apply it to practice problems. This integration sharpens your understanding, reinforces memory, and develops problem-solving skills—critical aspects of excelling in JEE Main 2025. Download the Important JEE Main Chemistry Formula PDF for free from Vedantu’s website and score more in your JEE Main 2025 Examinations.

How Can Atomic Structure Notes For JEE Mains Guide Your IIT Journey?

Atomic Structure is a core Chemistry topic, and understanding it well builds a strong base for more complex concepts in IIT-level Chemistry.
Atomic Structure Class 11 JEE Mains Notes summarise key concepts, formulas, and definitions, making revision faster and helping you focus on what’s most important for the exam.
Good notes provide step-by-step methods for solving problems, which can boost your confidence in tackling similar questions in exams.
By covering all essential points, notes help you save time on studying, giving you more time to focus on practice questions and other subjects.
Atomic Structure JEE Mains Notes PDFs are created to match the exam pattern, helping you become familiar with the type of questions and how to approach them.
Having notes in a downloadable PDF format means you can study anywhere, making it easier to fit quick reviews into your daily routine.
Atomic Structure JEE Mains Notes help you prepare effectively, giving you the tools to confidently approach your JEE Mains and ultimately support your IIT journey.

Check Other Important Links for JEE Main 2025 Atomic Structure

Explore additional resources beyond JEE Main 2025 Atomic Structure notes. Check out these other useful links that provide access to learning materials, practice papers, mock tests, and valuable insights. Enhance your preparation, overcome difficulties, and welcome achievement with these resources designed specifically for JEE Main 2025.

Other Important Links For JEE Main 2025	How It Is Helpful With Atomic Structure JEE Main Notes
JEE Main Atomic Structure Practice Papers 2025	These notes cover all essential concepts and formulas, making your revision straightforward and efficient. With well-organised notes, you feel more prepared and approach practice papers confidently. Structured notes allow you to quickly remember key information during revision and practice. By revisiting notes, you can pinpoint areas that need improvement. Regular review of these notes helps you perform better on practice papers.
JEE Main Chemistry Atomic Structure Mock Test 2025	When taking mock tests, having a thorough understanding of Atomic Structure through well-organised notes allows you to answer questions more accurately and efficiently. These notes prepare you to handle different types of questions in mock tests, helping you manage time and assess your readiness for the actual exam.
JEE Main Atomic Structure Important Questions	Important questions often focus on tricky concepts and commonly tested areas. Atomic Structure notes highlight these crucial points, guiding you to concentrate on questions that are most likely to appear in the exam. By revising these notes, you can confidently tackle important questions, ensuring a better grasp of topics frequently tested in JEE Mains.

JEE Chemistry Notes: Explore Chapters with 2025 Links

Explore structured JEE 2025 Chemistry Notes through easily accessible chapter-wise links. Delve into crucial subjects, comprehend fundamental ideas, and enhance exam readiness. Equip yourself with an advantage using these targeted notes.

S.No.	JEE Main 2025: Chapter-wise Chemistry Notes
1.	Unit 1 Some Basic Concepts in Chemistry JEE Notes
2.	Unit 3 Chemical Bonding and Molecular Structure JEE Notes
3.	Unit 4 Chemical Thermodynamics JEE Notes
4.	Unit 5 Solutions JEE Notes
5.	Unit 6 Equilibrium JEE Notes
6.	Unit 7 Redox Reactions and Electrochemistry JEE Notes
7.	Unit 8 Chemical Kinetics JEE Notes
8.	Unit 9 Classification of Elements and Periodicity in Properties JEE Notes
9.	Unit 10 P-Block Elements JEE Notes
10.	Unit 11 D- And F-Block Elements JEE Notes
11.	Unit 12 Coordination Compounds JEE Notes
12.	Unit 13 Purification and Characterisation of Organic Compounds JEE Notes
13.	Unit 14 Some Basic Principles of Organic Chemistry JEE Notes
14.	Unit 15 Hydrocarbons JEE Notes
15.	Unit 16 Organic Compounds Containing Halogens JEE Notes
16.	Unit 17 Organic Compounds Containing Oxygen JEE Notes
17.	Unit 18 Organic Compounds Containing Nitrogen JEE Notes
18.	Unit 19 Biomolecules JEE Notes
19.	Unit 20 Principles Related to Practical Chemistry JEE Notes

Score Higher by Using Vedantu’s JEE Main Notes for Preparation

On your path to success in exams, rely on Vedantu’s JEE Main Notes as your trustworthy partners. These notes make difficult topics easier, help you understand better, and prepare you thoroughly. With Vedantu's help, you can confidently tackle exams and find success. Embrace The benefits of JEE Main Notes – download them now to boost your preparation and achieve better exam results. The journey to excellence begins here, with Vedantu’s JEE Main Notes. Download the Free Notes Today and grasp your success!

Download Subject-wise Notes for JEE Main

Get the links to download the subject-wise JEE Main Notes FREE PDF from the table below.

S.No	Subject	Important Questions PDF
1	Physics	JEE Main Physics Notes
2	Maths	JEE Main Maths Notes

Important Study Materials Links for JEE Exams

S. No	Essential Study Material Links for JEE
1	JEE Main Notes
2	JEE Advanced Notes
3	JEE Main Important Question
4	JEE Advanced Important Question
5	JEE Main Question Paper
6	JEE Advanced Question Paper
7	JEE Main Sample Paper
8	JEE Advanced Sample Paper
9	JEE Main Syllabus
10	JEE Advanced Syllabus
11	JEE Main Mock Test Series
12	JEE Advanced Mock Test Series
13	JEE Preparation Tips
14	JEE Main Formulas
15	JEE Advanced Formulas
16	JEE Main Difference Between
17	JEE Advanced Difference Between
18	JEE Main Topic
19	JEE Main Question and Answers
20	JEE Advanced Question and Answers

FAQs on Chemistry Atomic Structure JEE Mains Notes 2025

1. What are the most important topics included in Atomic Structure Notes for JEE Main 2025?

The most important topics in Atomic Structure for JEE Main 2025 are the Bohr model, the quantum mechanical model, the wave nature of electrons, atomic spectra, and ionization energy. These topics are essential for understanding the structure and behaviour of atoms, and they are also the most likely to be tested on in the exam.

2. What is the weightage of Atomic Structure Notes for JEE Main 2025?

Atomic Structure has a weightage of 6-8% in the JEE Main 2025 exam. This means there are typically 3-4 questions on this topic in the exam.

3. Which is the easiest JEE Main 2025 Atomic Structure Notes Topic?

The easiest topic in Atomic Structure for JEE Main 2025 is atomic spectra. This topic is relatively straightforward and does not require a deep understanding of the concepts of atomic structure.

4. What are the Atomic Structure in the context of JEE Main 2025?

Atomic Structure is a fundamental concept in chemistry, and it is important for understanding the properties of matter and the behaviour of atoms. This makes it a valuable topic to study for the JEE Main 2025 exam.

5. How can I apply the Atomic Structure to solve JEE Main problems?

The concepts of Atomic Structure can be applied to solve problems related to atomic spectra, ionization energy, and other topics. For example, you can use the Bohr model to calculate the energy levels of electrons in an atom, and you can use the wave nature of electrons to explain the emission of light by atoms.

6. Are there any common mistakes students make in Atomic Structure problems?

Some common mistakes that students make in Atomic Structure problems include not understanding the concepts, making careless mistakes in calculations, and not applying the correct formulas. It is important to avoid these mistakes by practising with problems and getting help from a tutor or mentor.

7. Are JEE Main 2025 Atomic Structure Notes recommended for last-minute revision?

The Atomic Structure Notes can be helpful for last-minute revision, but it is important to understand the concepts before you start revising. You should also practice solving problems to make sure that you can apply the concepts to real-world situations.

8. What are the expected difficulty level of JEE Main Atomic Structure questions?

The difficulty level of JEE Main Atomic Structure questions is moderate. This means that you need to have a good understanding of the concepts and be able to apply them to solve problems.

9. How can atomic structure notes for JEE Mains simplify complex topics in Chemistry?

Atomic structure notes for JEE Mains simplify complex Chemistry topics by breaking down intricate concepts like atomic models, quantum numbers, and electron configurations into clear, easy-to-understand explanations. These notes organise information systematically, using concise definitions, diagrams, and examples to clarify each topic. With simplified formulas and key points highlighted, students can quickly grasp essential concepts, making their revision more efficient and helping them approach challenging questions with confidence.

10. What key topics are covered in atomic structure Class 11 JEE Mains notes?

Atomic structure Class 11 JEE Mains notes cover several key topics essential for a solid understanding of Chemistry, including:

Atomic Models: Overview of models like Dalton’s, Thomson’s, Rutherford’s, and Bohr’s model of the atom.
Subatomic Particles: Detailed study of protons, neutrons, and electrons, along with their properties.
Quantum Numbers: Explanation of principal, azimuthal, magnetic, and spin quantum numbers.
Electron Configuration: Rules for filling orbitals (Aufbau Principle, Pauli Exclusion Principle, Hund’s Rule).
Atomic Orbitals and Shapes: Visualisation of s, p, d, and f orbitals and their significance in atomic structure.
Emission and Absorption Spectra: Concepts of line spectra and their relation to atomic structure.