Question

We observed the Balmer series in this activity – the set of lines produced when the electron in hydrogen falls to the n = 2 level. Could the activity be performed with one of the other series in which the electron in hydrogen falls to either the n = 1 or n = 3 level? Why or why not? What might have to change if you did attempt to do so?

Answer 1

The Bohr model allows finding the energy range of each series and finding the results for the questions that are:

• The range cannot be changed because the observation method is the eye perceived by the visible.

• The detection means must be changed using a silicon diode that is sensitive to the ultraviolet, visible and infrared range.

Bohr's atomic model describes very well the spectrum of Hydrogen in this model, the energy of the levels is

    Eₙ = -13.606  $\frac{1}{n^2}$  [eV]

    with n = 1, 2, 3, ...

Where Eₙ is the level energy, n is the whole number, the quantity in brackets is the units of the energy.

A transition occurs when an electron goes from a higher energy level to a lower level,

   ΔE = 13.606  $( \frac{1}{n_i^2} - \frac{1}{n_f^2} ) \ \ n_i < n_f$)

Depending on the level reached, there are different energy values, from previous empirical studies these levels and their close series  have different names, see table.

Name serie     Final state   Characteristics

  Lyman                    1               Ultra violet

  Balmer                   2              Visible

 Paschen                  3             Infra red

In the most common activities, the observation method is sight, as the human eye can only perceive the visible range of the electromagnetism spectrum, we could not carry out the experiment for the other two series.

The change that must be made is to change the detection means, use a silicon diode that can see radiation from 200 nm to 1100 nm, that is, it is capable of perceiving the Ultraviolet, the visible and the infrared, the output in this case in en form of a voltage amplitude.

In conclusion, using the Bohr model we can find the energy range for each series and find the results for the questions that are:

• The range cannot be changed because the observation method is the eye that perceives the visible only.

• The means of detection must be changed, use a silicon diode to perceive the Ultraviolet, the visible and the infrared.

Learn more here:  brainly.com/question/3964366