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The energy liberated when an excited ele...

The energy liberated when an excited electron returns to its ground state can have:

A

any value from zero to infinity

B

only negative values

C

only specified positive values

D

None of the above

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The correct Answer is:
C
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One of the fundamental laws of physics is that matter is most stable with the lowest possible energy. Thus, the electron in a hydrogen atom usually moves in the n=1 orbit, the orbit in which it has the lowest energy. When the electon is in this lowest energy orbit, the atom is said to be in its ground electronic state. If the atom receives energy from an outside source, it is possible for the electron to move ot an orbit with a higher n value, in which case the atoms is in an excited state with a higher energy. The law of conservation of energy says that we cannot create or destroy energy. Thus, if a certain amount of external energy is required to excite an electron from one energy level to another, then that same amount of energy will be liberated when the electron returns to its initial state. Lyman series is observed when the electron returns to the lowest orbit while Balmer series is formed when the electron returns returns to second orbit. Similarly, Paschen, Brackett and Pfund series are formed when electrons returns to the third, fourth and fifth orbits from higher energy orbits respectively. When electrons return form n_(2) " to " n_(1) state, the number of lines in the spectrum will equal to ((n_(2)-n_(1))(n_(2)-n_(1)+1))/(2) If the electon comes back from energy level having energy E_(2) to energy level having energy E_(1) , then the difference may be expressed in terms of energy of photon as : E_(2)-E_(1)=DeltaE, deltaE implies (hc)/(lambda) Since, h and c are constant, deltaE corresponds to definite energy. Thus, each transition from one energy level to another will produce a radiatiob of definite wavelength. This is actually Wave number of a spectral line is given by the formula barv=R((1)/(n_(1)^(2))-(1)/(n_(2)^(2))) . where R is a Rydberg's constant (R=1.1xx10^(7) m^(-1)) An electron in H-atom in M-shell on de-excitation to ground state gives maximum ........... spectrum lines.

Calculate the energy required to excite an electron in hydrogen atom from the ground state to the next higher state, if the ionsation energy for the hydrogen atom is 13.6 eV .

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The energy needed to detach the electron of a hydrogen like ion in ground state is a system(a) what is the wavelength of the radiation emitted when the electron jumps from the first excited state to the ground state? (b) What is the radius of the orbit for this atom?

The value of 'n' of the highest excited state that an electron of hydrogen atom in the ground state can reach when 12.09eV energy is given to the hydrogen atom is.

The energy of an electron in the nth orbit is given by E_(n)=-13.6//n^(2) eV . Calculate the energy required to excite an electron from ground state to the second excited state.

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OP TANDON-ATOMIC STRUCTURE -Questions with single correct Answer
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  6. Which point does not pertain to Bohr's model of atom?

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  7. According to Boohr's theory the angular momentum of an electron in 5th...

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  8. A gas absorbs a photon of 355 nm and emits at two wavelengths . If on...

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  9. If n = 6, the correct sequence for filling of electrons will be.

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  10. Which of the following electron transitions in a hydrogen atom will re...

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  11. For a hydrogen atom, the energies that an electron can have are given ...

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  12. The energy of a hydrogen atom in its ground state is -13.6 eV. The ene...

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  13. E(n)=-313.6//n^(2) kcal/mol. If the value of E=-34.84 kcal/mol, to whi...

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  14. The ratio of the difference between 1 st and 2nd Bohr orbits energy to...

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  15. The energy difference between two electronic states is 43.56 kcal/mo. ...

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  16. Which of the following transitions of an electron in hydrogen atom emi...

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  17. The value of (n(2)+n(1)) and (n(2)^(2)-n(1)^(2)) for He^(+) ion in at...

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  18. Number of possible spectral lines which may be emitted in brackett ser...

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  19. Which electronic level would allow the hydrogen atom to absorbs a phot...

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  20. The spectral lines corresponding to the radiation emitted by an electr...

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