Description

🔬 Class 9 Science Quiz — Structure of the Atom (LOD - 1, NCERT Based)

🕐 Quiz Format

• Total Questions: 20

• Question Type: Multiple Choice Questions (MCQs)

• Difficulty Level: Easy to Moderate (LOD-1)

• Time Limit: 30 minutes

🧭 Topics Covered

• Discovery of Electrons, Protons & Neutrons

• Thomson’s Model of Atom

• Rutherford’s Gold Foil Experiment

• Bohr’s Model & Energy Levels

• Atomic Number & Mass Number

• Isotopes and Isobars

• Electronic Configuration

• Basic Numericals (neutrons, mass number, atomic number)

📘 Description

This quiz is designed to test your understanding of fundamental concepts from Chapter – Structure of the Atom (Class 9, NCERT Science).

It includes basic conceptual, diagram-based, and numerical questions related to the discovery of subatomic particles, atomic models, electronic configuration, isotopes, isobars, and calculation of atomic and mass numbers.

Perfect for revision, practice, class tests, and school assessments.

🎯 Learning Objectives

By attempting this quiz, students will be able to:

✔ Understand the discovery and properties of electrons, protons, and neutrons
✔ Recall key features of Thomson’s, Rutherford’s, and Bohr’s atomic models
✔ Identify atomic number, mass number, isotopes, and isobars
✔ Write correct electronic configurations using 2n² rule
✔ Solve basic numerical problems related to atomic structure