ورقة عمل ( حساب أنصاف أقطار مدارات الإلكترون في ذرة الهيدروجين )

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| By Basma
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Basma
Community Contributor
Quizzes Created: 3 | Total Attempts: 1,980
Questions: 5 | Attempts: 285

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Questions and Answers
  • 1. 

    1. إذا كان نصف قطر المدار الأول في ذرة الهيدروجين يساوي ( r1 ) فإن نصف قطر المدار الرابع يساوي..........

    Explanation
    The question is asking for the value of the radius of the fourth orbit in hydrogen atom, given that the radius of the first orbit is r1. The answer states that the radius of the fourth orbit is equal to 16 times the radius of the first orbit (4r = 16r1). This implies that the radius of each successive orbit in the hydrogen atom increases by a factor of 4.

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  • 2. 

    نصف قطر المدار الأول لذرة الهيدروجين يسمى ...................

    Explanation
    The correct answer for this question is "نصف قطر بور" which translates to "Bohr radius" in English. The Bohr radius is a fundamental physical constant that represents the radius of the first orbit of a hydrogen atom. It is named after the Danish physicist Niels Bohr, who proposed the Bohr model of the atom. The Bohr model describes electrons as orbiting the nucleus in specific energy levels, and the Bohr radius is the distance between the electron and the nucleus in the first energy level.

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  • 3. 

    إذا كان نصف قطر المدار الأول لإلكترون ذرة الهيدروجينr   فإن نصف قطره في المدار الثالث يساوي

    • A.

      R/9

    • B.

      R/3

    • C.

      3r

    • D.

      9r

    Correct Answer
    D. 9r
    Explanation
    The question is asking for the value of the radius in the third orbit of an electron in a hydrogen atom, given the radius of the first orbit as "r". The correct answer is 9r, which means that the radius in the third orbit is nine times the radius of the first orbit. This implies that as the electron moves to higher energy levels or orbits, the distance from the nucleus increases.

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  • 4. 

    1. نصف قطر المدار الثالث للإلكترون في ذرة الهيدروجين يساوي ثلاثة أمثال نصف قطر المدار الأول.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement is false. According to the Bohr model of the hydrogen atom, the radius of the electron's third orbit is nine times larger than the radius of the first orbit, not three times larger.

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  • 5. 

    يتناسب نصف قطر مدار الإلكترون في ذرة الهيدروجين تناسباً طردياً مع رتبة المدار.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement is false. The radius of the electron orbit in a hydrogen atom is not directly proportional to the orbit's order. In fact, the radius of the electron orbit increases as the orbit's order increases. This is known as the Bohr radius, and it is given by the equation r = a₀/n², where a₀ is the Bohr radius constant and n is the orbit's order.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 27, 2020
    Quiz Created by
    Basma
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