Download 9th class Chemistry chapter 2 "Atomic Structure" MCQs notes in PDF. Get class 9 chemistry new PECTAA text book exercise mcqs plus extra multiple choice questions with answers according to Punjab Boards new syllabus 2025-26 and onwards. All 50 MCQs of the unit are covered, taking in isotopes and their abundances, the isotopes used in medicine and dating, and calculations of relative atomic mass, with an answer key at the end.

Details

These are the multiple choice questions for Unit 2, Atomic Structure, from the new 9th class Chemistry book followed by the Punjab boards. The textbook exercise MCQs come first, then a longer set of additional MCQs arranged topic by topic, and the answer key sits at the end of the file.

Class: 9th (Matric Part 1)
Subject: Chemistry, English Medium
Unit 2: Atomic Structure
Question type: Multiple choice questions
Total MCQs: 50, followed by an answer key table
Syllabus: New PECTAA syllabus for Punjab Boards, sessions 2025-26 and 2026-27
Format: PDF, ready to read or print

Topics the questions are drawn from:

Isotopes and their natural abundance, including carbon-13, carbon-14 and uranium-235
Isotopes used in medicine and dating, such as iodine-131 and carbon-14
Masses of the proton, neutron and electron in amu
Heavy water and how it differs from ordinary water
Working out relative atomic mass from the abundances of two isotopes

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