Proven Strategies to Ace Atomic Structure in JEE Main Mock Tests
Atomic Structure is foundational for mastering Chemistry in JEE Main 2025, covering essential concepts like Bohr’s model, quantum numbers, and electronic configurations. Take this specially designed mock test to reinforce your understanding, practice JEE-level questions, and identify your strengths before the big exam!
Mock Test Instructions for the Atomic Structure Mock Test 1-2:
- 20 questions from Atomic Structure Mock Test 1-2
- Time limit: 20 minutes
- Single correct answer per question
- Correct answers appear in bold green after submission
How Can JEE Mock Tests Help You Master Atomic Structure?
- Mock tests quickly reveal gaps in understanding topics like Bohr’s model and electronic configuration.
- Regular practice improves familiarity with quantum numbers and tricky theory-based MCQs.
- Attempting chapter-wise timed tests enhances speed and accuracy for competitive exams.
- Helps in identifying and correcting common mistakes related to isotopes and quantum rules.
- Personalized feedback highlights strengths and areas needing revision in Atomic Structure.
Strengthen Your Atomic Structure Concepts with Expert-Designed JEE Mock Tests
- Boost your exam confidence by solving diverse MCQs covering all subtopics of Atomic Structure.
- Develop deep conceptual clarity on dual nature, electronic configuration, and periodic trends.
- Master the art of eliminating wrong options using real JEE-style pattern questions.
- Refine strategy by reviewing instant analytics after each mock test attempt.
- Stay updated with the latest JEE exam trends and expected question types in Atomic Structure.
Subject-Wise Excellence: JEE Main Mock Test Links
| S.No. | Subject-Specific JEE Main Online Mock Tests |
|---|---|
| 1 | Online FREE Mock Test for JEE Main Chemistry |
| 2 | Online FREE Mock Test for JEE Main Maths |
| 3 | Online FREE Mock Test for JEE Main Physics |
Important Study Materials Links for JEE Exams
FAQs on JEE Main Atomic Structure Mock Test 2025-26: Practice & Solutions
1. What is the basic structure of an atom?
An atom consists of three main subatomic particles: protons and neutrons located in the nucleus, and electrons revolving around the nucleus in various energy shells. The nucleus is densely packed and positively charged, while electrons occupy the surrounding electron cloud.
2. Who proposed the modern quantum mechanical model of atomic structure?
The modern quantum mechanical model of the atom was proposed by Erwin Schrödinger, based on quantum theory and the Heisenberg Uncertainty Principle. This model describes electrons as existing in orbitals with specific energy distributions, rather than fixed circular orbits.
3. What are quantum numbers and why are they important in atomic structure?
Quantum numbers are a set of four numerical values that describe the unique position and energy of an electron in an atom: principal (n), azimuthal (l), magnetic (m), and spin (s). They determine energy levels, subshells, orbitals, and spin orientation of electrons.
4. What are isotopes and how do they differ from each other?
Isotopes are atoms of the same element with the same number of protons but different numbers of neutrons. They have identical atomic numbers but different mass numbers, leading to variations in physical properties and nuclear stability.
5. How is the electronic configuration of an element determined?
The electronic configuration of an element is determined using the Aufbau principle, Pauli Exclusion Principle, and Hund's Rule. Electrons fill lower energy orbitals first (aufbau), each orbital can hold only two electrons with opposite spins (Pauli), and in degenerate orbitals, electrons occupy singly before pairing (Hund).
6. What is meant by the term 'atomic mass unit' (amu)?
The atomic mass unit (amu) is a standard unit used to express the mass of atomic and subatomic particles. One amu is defined as one-twelfth the mass of a carbon-12 atom (1 amu ≈ 1.66 × 10-24 grams).
7. What are the limitations of Rutherford’s Atomic Model?
Rutherford’s Atomic Model could not explain the stability of an atom and the existence of discrete line spectra. According to classical physics, electrons should continuously lose energy and spiral into the nucleus, which does not happen in reality.
8. Explain the significance of Bohr’s model in atomic structure.
Bohr’s Model introduced the idea of quantized energy levels for electrons revolving around the nucleus, preventing their collapse into the nucleus. It successfully explained the spectral lines of hydrogen and introduced the concept of stationary orbits.
9. What is the difference between orbit and orbital in atomic structure?
An orbit is a fixed circular path described by older models (like Bohr), whereas an orbital is a three-dimensional region in space where the probability of finding an electron is maximum, as described in the quantum mechanical model.
10. What is Pauli’s Exclusion Principle?
Pauli’s Exclusion Principle states that no two electrons in an atom can have the same set of four quantum numbers. This limits the number of electrons present in specific orbitals and is essential for explaining electron configurations and the periodic table arrangement.
11. What is Hund's Rule of Maximum Multiplicity?
Hund’s Rule of Maximum Multiplicity states that electrons will fill degenerate orbitals (orbitals with same energy) singly first, with parallel spins, before any orbital gets a second electron. This minimizes electron repulsion and maximizes stability.
12. How do you distinguish between atomic number and mass number?
The atomic number (Z) is the number of protons present in an atom’s nucleus, which determines the element's identity. The mass number (A) is the total number of protons and neutrons in the nucleus and determines the atomic mass of the isotope.
