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Bohr's model could not explain the spect...

Bohr's model could not explain the spectra of ………………

A

Hydrogen

B

`He^(+)`

C

`Li^(2+)`

D

Heavier atoms

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The correct Answer is:
D
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Bohr’s atomic model explains the spectrum of _______

In Bohr model of atom :

Just as Bohr.s model of atom was developed on the basis of planck.s quantum theory, wave mechanical model of atom has been developed on the basis of quantum mechanics. The herat of quantum mechanism is Schrodinger wave equation which in turn is based on Heisenberg.s uncetainity principle and de broglie concept of dual nature of matter and radiation. Bohr model could explain the main lines of hydrogen or hydrogenic spectra but could not explain their fine structure. To explain this, it was suggested that each level consists of a number of sublevels, it was suggested that each level consists of a number of sublevels, the transitions between which gave rise to closely spaced lines. The numbers representing the main energy level are called Princiapl Quantum Number (n) while those representing sublevels are called Azimuthal Quantum numbers (l) and these determine the angular momentum of the electron. The orbital angular Number (m) which is just like a further split of a sublevel into finer sublevels. Lastly the electron may rotate or spin about its own axis given rise to Spin Quantum number (s) which determines the angular momentum of the electron. The electron spin magnetic moment of Fe^(2+) ion in FeSO_(4) in Bohr magnetons (B.M) is

Just as Bohr.s model of atom was developed on the basis of planck.s quantum theory, wave mechanical model of atom has been developed on the basis of quantum mechanics. The herat of quantum mechanism is Schrodinger wave equation which in turn is based on Heisenberg.s uncetainity principle and de broglie concept of dual nature of matter and radiation. Bohr model could explain the main lines of hydrogen or hydrogenic spectra but could not explain their fine structure. To explain this, it was suggested that each level consists of a number of sublevels, it was suggested that each level consists of a number of sublevels, the transitions between which gave rise to closely spaced lines. The numbers representing the main energy level are called Princiapl Quantum Number (n) while those representing sublevels are called Azimuthal Quantum numbers (l) and these determine the angular momentum of the electron. The orbital angular Number (m) which is just like a further split of a sublevel into finer sublevels. Lastly the electron may rotate or spin about its own axis given rise to Spin Quantum number (s) which determines the angular momentum of the electron. The quantum number not obtained from the solution of Schrodinger wave equation is

Just as Bohr.s model of atom was developed on the basis of planck.s quantum theory, wave mechanical model of atom has been developed on the basis of quantum mechanics. The herat of quantum mechanism is Schrodinger wave equation which in turn is based on Heisenberg.s uncetainity principle and de broglie concept of dual nature of matter and radiation. Bohr model could explain the main lines of hydrogen or hydrogenic spectra but could not explain their fine structure. To explain this, it was suggested that each level consists of a number of sublevels, it was suggested that each level consists of a number of sublevels, the transitions between which gave rise to closely spaced lines. The numbers representing the main energy level are called Princiapl Quantum Number (n) while those representing sublevels are called Azimuthal Quantum numbers (l) and these determine the angular momentum of the electron. The orbital angular Number (m) which is just like a further split of a sublevel into finer sublevels. Lastly the electron may rotate or spin about its own axis given rise to Spin Quantum number (s) which determines the angular momentum of the electron. The de Broglie wavelength (lambda) of the electron subjected to an accelerating potential of V volts is given by

VGS PUBLICATION-BRILLIANT-WHAT IS INSIDE THE ATOM ?-OBJECTIVE TYPE QUESTIONS
  1. Electrons must ………………… energy to move to a lower energy level.

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  2. According to Bohr, while electrons are revolving in ……………..

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  3. Bohr's model could not explain the spectra of ………………

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  4. The rules for distribution of electrons is given by …………….

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  5. Maximum of number of electrons that can be accommodated in M - shell i...

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  6. The electronic structure of oxygen is

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  7. The number of electrons present in outer most orbit of an atom is call...

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  8. An outer most shell which has 8 electrons is said to possess in ………………...

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  9. An atom with 8 electrons in its outer most shell is chemically …………

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  10. Atom of an element react with other atoms, to achieve …………………… in thei...

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  11. An atom can achieve octet by ……………..or ………………of electrons.

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  12. Transfer of sharing of electrons by an atom results in the formation o...

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  13. The number of protons in the nucleus of an atom is its …………….

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  14. The number of nucleons is called …………….of the atom.

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  15. Number of neutrons N = ………..

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  16. Atomic number is denoted by ………………

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  17. Mass number is denoted by

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  18. The elements which have a highest number of known isotopes are ……………. ...

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  19. The isotopes of Uranium is used as fuel is ……………… reactors.

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  20. The isotope of ……………is used in treatment of cancer.

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