Question

Answer all of these, please

How does the energy possessed by an emitted photon compare to the difference in energy levels that gave rise to the emission of the photon? When a tube containing hydrogen atoms is energized by pass- ing several thousand volts of electricity into the tube, the hy- drogen emits light that, when passed through a prism, resolves into the "bright line" spectrum shown in Fig. 11.10. Why do hydrogen atoms emit bright lines of specific wavelengths rather than a continuous spectrum? Figure 11.10When excited hydrogen atoms return to lower energy states, they emit photons of certairn energies, and thus certain colors. Shown here are the colors and wavelengths (in nanometers) of the photons in the visible region that are emitted by excited hydrogen atoms. $2, What overall shape do the 2p and 3p orbitals have? How do the 2p orbitals differ from the 3p orbitals? How are they similar? 6. Complete the following table. Possible Sublevels Value of n 4 40) The number of sublevels in a principal energy level (increases/ 42 According to the Pauli exclusion principle, the electrons spins. within a given orbital must have

Answer 1

Ans to qsn no. 18: A photon possess energy equals to "hv". where h is called Planck's constant and v is the frequency of the light. As the frequency increases, the energy also increases.

Atoms or molecules when irradiated by photon, it produce an emission specrum.

Ans to qsn no. 20: The light emitted by hydrogen possess various types of radiations of different wavelength. There are some line spectrum for hydrogen atom such Lyman series, Balmer series, Paschen series, Brackett series and Pfund series.

When light emitted by a sample of excited hydrogen atoms are passed through a prism it separated into certain discrete wavelengths. The H atom absorbs only certain light of wavelength. When the electron in the H atom absorbs energy it goes in the higher excited state and comes back giving out the radiation. Since only certain lights are absorbed so it gives spectral lines of a specific wavelength and continuous spectral lines are not observed.

Ans to qsn no. 32: The shape of 2p and 3p is dumbell shape.

Ans to qsn no 36:

Value of n                                 possible sublevels

1                                                               s(0)

2                                                          s,p(0,1)

3                                                   s,p,d(0,1,2)

4                                               s,p,d,f(0,1,2,3)

Ans to qsn no 40: The number of sublevels in a principle energy level increases as n increases.

Ans to qsn no 42: According to the Pauli exclusion principal the electrons within a given orbital must have opposite spins.