ورقة عمل نماذج الذرة ونظرية الكم

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| By Basma
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Basma
Community Contributor
Quizzes Created: 3 | Total Attempts: 1,980
Questions: 7 | Attempts: 1,153

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Questions and Answers
  • 1. 

    1. اعتماداً على تجربة ارنست رذرفورد لدراسة الذرة وذلك بتوجيه أشعة ألفا على صفيحة رقيقه من الذهب , فإن جميع الملاحظات التالية صحيحة عدا واحدة و هي :

    • A.

      نفاذ معظم أشعة ألفا.

    • B.

      انحراف بعضاً من أشعة ألفا.

    • C.

      ارتداد بعضا من أشعة ألفا

    • D.

      امتصاص جسيمات الفا و انبعاث طيف خطي .

    Correct Answer
    D. امتصاص جسيمات الفا و انبعاث طيف خطي .
    Explanation
    Based on Ernest Rutherford's experiment of directing alpha particles onto a thin gold foil, it was observed that most of the alpha particles passed through the foil, some were deflected, and some were reflected. However, the statement "absorption of alpha particles and emission of line spectrum" is incorrect. In Rutherford's experiment, there was no observation of absorption of alpha particles or emission of a line spectrum.

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  • 2. 

    1. تفترض نظرية الكم لماكس بلانك أن الطاقة الإشعاعية تنبعث أو تمتص عل هيئة :

    • A.

      سيل متصل من الإلكترونات

    • B.

      نبضات متتابعة من الإلكترونات

    • C.

      سيل متصل من الفوتونات

    • D.

      نبضات متتابعة من الفوتونات

    Correct Answer
    D. نبضات متتابعة من الفوتونات
    Explanation
    According to Max Planck's quantum theory, energy is emitted or absorbed in the form of discrete packets called photons. Therefore, the correct answer is "نبضات متتابعة من الفوتونات" which translates to "successive pulses of photons".

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  • 3. 

    اعتبر دالتون أن الذرة أصغر جزء من المادة لا يمكن تقسيمه إلى أجزاء أخرى ويحمل خواص المادة.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Dalton's atomic theory states that atoms are the smallest indivisible particles of matter and they retain the properties of the substance. This means that atoms cannot be divided into smaller parts without losing their characteristic properties. Therefore, the statement "The atom is the smallest part of matter that cannot be divided into smaller parts and it retains the properties of the substance" is true according to Dalton's theory.

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  • 4. 

    افترض راذرفورد أن الشحنة الموجبة للذرة تتمركز في نواتها.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The statement is true because according to Rutherford's model of the atom, the positive charge of the atom is concentrated in its nucleus. The nucleus contains protons, which have a positive charge, while the electrons, which have a negative charge, orbit around the nucleus. This model was proposed by Ernest Rutherford based on his gold foil experiment, where he observed that most of the alpha particles passed through the foil, indicating that the positive charge of the atom is concentrated in a small, dense region.

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  • 5. 

    تعتبر الذرة مكونة من كتلة موجبة تحتوي على الالكترونات حسب النموذج الذري لـ .....................

    Correct Answer
    طومسون
    Explanation
    The given answer, "طومسون", is the name of the scientist who proposed the atomic model that states that atoms consist of a positive mass with electrons distributed within it. This model, known as the Thomson atomic model, suggests that the positive mass is evenly distributed and the electrons are embedded within it. Therefore, the statement in the question implies that according to the Thomson atomic model, atoms are composed of a positive mass with electrons.

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  • 6. 

    1. مقدار ثابت بلانك (h) يساوي النسبة بين طاقة الفوتون (E) و.......................الفوتون 

    Correct Answer
    تردد
    Explanation
    The equation that relates the energy of a photon (E) to its frequency (f) is E = hf, where h is the Planck constant. Therefore, the constant value of Planck (h) is equal to the ratio between the energy of the photon (E) and its frequency (f).

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  • 7. 

    1. طاقة الفوتون تتناسب طردياً مع .....................

    Correct Answer
    تردده
    Explanation
    The frequency of a photon is directly proportional to its energy.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 26, 2020
    Quiz Created by
    Basma
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