Punjab Chemistry Online 9th Class Test Lesson 2 Structure of Atom

Photo of Malik Tahir Malik TahirLast Updated: September 29, 2025

According to Dalton that An Atom is and invisible, hard dense sphere, Atoms of the same element are alike, Atoms combine in different ways to form a compound. In 1932 James chadwick discovered a neutron. When he bom-barded alpha particles on a beryllium target He observed that highly penetrating radiations were produced.

Structure of Atom Lesson 2 Chemistry Online Test 9th Below

This quiz must be completed in 30 minutes.
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Photo of Malik Tahir Malik TahirLast Updated: September 29, 2025
Photo of Malik Tahir

Malik Tahir

Greetings, learners! I'm Tarry Malik, your guide to conquering the world of Exams prep and Online studies. Let's navigate the textbooks together, share study hacks, and make your educational journey a breeze.
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