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Chapter 8 of 14
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Atoms

Madhya Pradesh Board · Class 12 · Physics

Flashcards for Atoms — Madhya Pradesh Board Class 12 Physics. Quick Q&A cards covering key concepts, definitions, and formulas.

97 questions68 flashcards5 concepts

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A labeled diagram showing the experimental setup for the Geiger-Marsden alpha-particle scattering experiment, including the alpha source, lead bricks, gold foil, and a movable detector screen.
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68 Flashcards
Card 1Thomson and electron discovery

J. J. Thomson के गैसों में विद्युत निर्वहन पर किए गए प्रयोगों का परिणाम बताइए।

Answer

1897 में गैसों में विद्युत निर्वहन प्रयोगों के माध्यम से इलेक्ट्रॉन की खोज हुई। ये कण सभी परमाणुओं में समान होते हैं और ऋणात्मक आवेश वहन करते हैं।

Card 2Thomson and electron discovery

State the result of J. J. Thomson’s experiments on electric discharge through gases.

Answer

Electrons were discovered in 1897 through electric discharge experiments in gases. These particles are identical in all atoms and carry negative charge.

Card 3Thomson atomic model

What is Thomson’s atomic model called, and how is positive charge arranged in it?

Answer

Thomson proposed the plum pudding model in 1898. The positive charge is uniformly distributed throughout the atom, and electrons are embedded in it like seeds in a watermelon.

Card 4Thomson atomic model

Thomson के परमाणु मॉडल को क्या कहा जाता है, और उसमें धनात्मक आवेश कैसे व्यवस्थित होता है?

Answer

Thomson ने 1898 में प्लम पुडिंग मॉडल प्रस्तावित किया। धनात्मक आवेश पूरे परमाणु में समान रूप से वितरित रहता है, और इलेक्ट्रॉन उसमें तरबूज में बीजों की तरह जड़े होते हैं।

Card 5Limitations of Thomson model

Thomson का मॉडल अस्थिर क्यों है?

Answer

यह वैद्युतस्थैतिक रूप से अस्थिर है। जड़े हुए ऋणात्मक इलेक्ट्रॉनों और वितरित धनात्मक आवेश वाला मॉडल परमाणु के लिए एक स्थिर विन्यास प्रदान नहीं करता।

Card 6Limitations of Thomson model

Why is Thomson’s model unstable?

Answer

It is unstable electrostatically. A model with embedded negative electrons and distributed positive charge does not provide a stable arrangement for the atom.

Card 7Rutherford atomic model

State Rutherford’s nuclear model of the atom.

Answer

In Rutherford’s model, the entire positive charge and most of the mass are concentrated in a small nucleus, and electrons revolve around it like planets around the sun.

Card 8Rutherford atomic model

परमाणु के Rutherford के नाभिकीय मॉडल का कथन कीजिए।

Answer

Rutherford के मॉडल में, पूरा धनात्मक आवेश और द्रव्यमान का अधिकांश भाग एक छोटे नाभिक में केंद्रित होता है, और इलेक्ट्रॉन उसके चारों ओर सूर्य के चारों ओर ग्रहों की तरह परिक्रमा करते हैं।

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Frequently Asked Questions

What are the important topics in Atoms for Madhya Pradesh Board Class 12 Physics?
Atoms covers several key topics that are frequently asked in Madhya Pradesh Board Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Atoms — Madhya Pradesh Board Class 12 Physics?
Understand the core concepts first, then work through the 97 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
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There are 68 flashcards for Atoms covering key definitions, formulas, and concepts. Use them daily for 10–15 minutes for best results.

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