Interpretation The total number of emission lines, if only five quantum levels are considered has to be determined. Concept introduction: Electronic transitions that take place in excited H atom is, Lyman series: electronic transitions take place to the n = 1 level and it is in ultraviolet region. Balmer series: electronic transitions take place from n > 2 to the n = 2 level and it is in visible region. Ritz-Paschen series: electronic transitions take place from n > 3 to the n = 3 level and it is in infrared region. Brackett series: electronic transitions take place from n > 4 to the n = 4 level. Pfund series: electronic transitions take place from n > 5 to the n = 5 level

BuyFind

Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
BuyFind

Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

Solutions

Chapter 6, Problem 17PS

(a)

Interpretation Introduction

Interpretation The total number of emission lines, if only five quantum levels are considered has to be determined.

Concept introduction:

  • Electronic transitions that take place in excited H atom is,

    Lyman series: electronic transitions take place to the n=1 level and it is in ultraviolet region.

    Balmer series: electronic transitions take place from n>2 to the n=2 level and it is in visible region.

    Ritz-Paschen series: electronic transitions take place from n>3 to the n=3 level and it is in infrared region.

    Brackett series: electronic transitions take place from n>4 to the n=4 level.

    Pfund series: electronic transitions take place from n>5 to the n=5 level

(b)

Interpretation Introduction

Interpretation The transition of the photons emitted with longest wavelength and highest frequency has to be determined.

Concept introduction:

  • Electronic transitions that take place in excited H atom is,

    Lyman series: electronic transitions take place to the n=1 level and it is in ultraviolet region.

    Balmer series: electronic transitions take place from n>2 to the n=2 level and it is in visible region.

    Ritz-Paschen series: electronic transitions take place from n>3 to the n=3 level and it is in infrared region.

    Brackett series: electronic transitions take place from n>4 to the n=4 level.

    Pfund series: electronic transitions take place from n>5 to the n=5 level

  • Planck’s equation,

  E=where, ν=frequencyλ=wavelength

  • As the energy gap between two transition states increases the frequency of the radiation emitted also increases.

(c)

Interpretation Introduction

Interpretation The transition of the photons emitted with longest wavelength has to be determined.

Concept introduction:

  • Electronic transitions that take place in excited H atom is,

    Lyman series: electronic transitions take place to the n=1 level and it is in ultraviolet region.

    Balmer series: electronic transitions take place from n>2 to the n=2 level and it is in visible region.

    Ritz-Paschen series: electronic transitions take place from n>3 to the n=3 level and it is in infrared region.

    Brackett series: electronic transitions take place from n>4 to the n=4 level.

    Pfund series: electronic transitions take place from n>5 to the n=5 level

  • Planck’s equation,

  E=where, ν=frequencyλ=wavelength

  • As the energy gap between two transition states increases the frequency of the radiation emitted also increases.

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