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    which scientist gave the concept of fixed energy levels around the nucleus?

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    Who gave the concept of fixed energy levels around the nucleus?

    Who gave the concept of fixed energy levels around the nucleus?

    Byju's Answer Standard XII Chemistry

    Heisenberg's Uncertainty Principle

    Who gave the ... Question

    Who gave the concept of fixed energy levels around the nucleus?

    A

    Ernest Rutherford

    B

    Neils Bohr

    C

    J.J.Thomsan

    D

    None of these

    Open in App Solution

    The correct option is B

    Neils BohrNeil Bohr gave the concept of fixed energy levels around the nucleus.

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    A ) non Bonding molecular orbital

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    Which scientist gave the concept of fixed energy levels around the nucleus?

    Click here👆to get an answer to your question ✍️ Which scientist gave the concept of fixed energy levels around the nucleus?

    Question

    Which scientist gave the concept of fixed energy levels around the nucleus?

    A

    Ernest Rutherford

    B

    Neils Bohr

    C

    J. J. Thomson

    D

    None of these

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    [Solved] Which scientist gave the concept of fixed energy levels arou

    Explanation: Bohr's model of Atom: 1. Electrons revolve in different orbits around the nucleus. The electron in the hydrogen atom can mo

    Home Physics Dual Nature: Photon and Matter Waves The Hydrogen Atom The Bohr Model of Hydrogen

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    Which scientist gave the concept of fixed energy levels around the nucleus?

    Ernest Rutherford Neils Bohr J.J.Thomsan None of these

    Answer (Detailed Solution Below)

    Option 2 : Neils Bohr

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    Explanation:Bohr's model of Atom:

    1. Electrons revolve in different orbits around the nucleus.

    The electron in the hydrogen atom can move around the nucleus in a circular path of fixed radius and energy.

    These paths are called orbits, stationary states, or allowed energy states.

    These orbits are arranged concentrically around the nucleus.

    2. The energy of the electrons in the orbit is quantized.

    The energy of an electron in the orbit does not change with time.

    However, the electron will move from a lower to a higher stationary state when the required amount of energy is absorbed by the electron.

    Energy is emitted when an electron moves from a higher to a lower stationary state.

    The energy change does not take place in a continuous manner.

    Thus, the energy of an electron is quantized.

    The electron in the orbit nearest the nucleus has the lowest energy.

    The energy of an electron is En = - RH(Z2/n2)

    where, n=1,2,3...(or) K,L,M,N.. ; Z= 1 for the Hydrogen atom; RH is Rydberg's constant and its value is 2.18 ×10-10J.

    E1 = –2.18×10–18 (1/12 )    = – 2.18 × 10–18 J

    E2 = –2.18×10–18 (1/22 ) = – 0.545 × 10–18 J

    Thus, energies of various levels in the order:

    K < L < M < N..... and so on.

    Hence, the concept of fixed energy levels around the nucleus was put forward by Neil's Bohr.Additional Information

    Thomson model of Atom:

    The first model of the Atom was proposed by J.J Thomson.

    According to this, the positive charge is spread over a sphere with the electrons embedded in it such that the atom as a whole is electrically neutral.

    This model is also called the Plum pudding model.

    Rutherford's Nuclear Model of Atom:

    Ernest Rutherford put forward the Nuclear Model of the Atom.

    This model was proposed on the basis of a Scattering experiment.

    It resembles the solar system.

    The postulates of Rutherford's atomic model is as follows:-

    1. Most of the mass and all the positive charge of an atom is concentrated in a very small region called a nucleus.

    2. The magnitude of the charge on the nucleus is different for atoms of different elements.

    3. The nucleus is surrounded by electrons which are revolving around it at very high speeds.

    4. Most of the space in an atom is empty.

    Bohr's model of Atom:Niel's Bohr proposed Bohr's model of the atom.

    His theory is a modification of Rutherford's model based on the quantum theory of radiation.

    The postulates of Bohr's model of Atom is as follows:-

    1. The electrons revolve around the nucleus only in certain selected circular paths called Orbits.

    2. As long as an electron remains in a particular orbit, it does not lose or gain energy.

    3. If an electron jumps from one stationary state to another, it will absorb or emit radiation of a definite frequency.

    4. Only those orbits are permitted in which the angular momentum of the electron is a whole no: multiple of

    h2π .

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    More The Hydrogen Atom Questions

    Q1. The radius of the first permitted Bohr orbit, for the electron, in a hydrogen atom equals 0.51 Å and its ground state energy equals −13.6 eV. If the electron in the hydrogen atom is replaced by muon (μ−) [charge same as electron and mass 207 me], the first Bohr radius and ground state energy will be,Q2. The ratio for the speed of the electron in the 3rd orbit of He+ to the speed of the electron in the 3rd orbit of hydrogen atom will be :Q3. Let T1 and T2 be the energy of an electron in the first and second excited states of hydrogen atom, respectively. According to the Bohr's model of an atom, the ratio T1 ∶ T2 is:Q4. According to Bohr atom model, in which of the following transitions will the frequency be maximum ?Q5. In the given figure, the energy levels of hydrogen atom have been shown along with some transitions marked A, B, C, D and E. The transitions A, B and C respectively represent:Q6. The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom, is

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