Chapter 7, Problem 7.93P

(a)

Interpretation Introduction

Interpretation:

The colors for ${\text{Na}}^{+}$ and ${\text{K}}^{+}$ emissions are to be determined.

Concept introduction:

The study of the absorption and emission of electromagnetic radiations by atoms is called atomic spectroscopy. The electrons in an atom absorb radiations with different energies in order to jump from a lower energy level to a higher energy level. As the electron moves to a higher energy level, its distance from the nucleus increases. The excited electron jumps to a lower energy level by the release of energy in the form of radiation. This is the emission spectra. Atomic spectra are also called line spectra because the emitted radiation is observed as a series of colored lines on a dark background. Atoms of two different elements cannot have the same spectral lines.

(b)

Interpretation Introduction

Interpretation:

The role of the cobalt-glass filter is to be determined.

Concept introduction:

The study of the absorption and emission of electromagnetic radiations by atoms is called atomic spectroscopy. The electrons in an atom absorb radiations with different energies in order to jump from a lower energy level to a higher energy level. As the electron moves to a higher energy level, its distance from the nucleus increases. The excited electron jumps to a lower energy level by the release of energy in the form of radiation. This is the emission spectra. Atomic spectra are also called line spectra because the emitted radiation is observed as a series of colored lines on a dark background. Atoms of two different elements cannot have the same spectral lines.

(c)

Interpretation Introduction

Interpretation:

The reason ${\text{KClO}}_4$ is used as an oxidizing agent in fireworks rather than ${\text{NaClO}}_4$ is to be determined.

Concept introduction:

The study of the absorption and emission of electromagnetic radiations by atoms is called atomic spectroscopy. The electrons in an atom absorb radiations with different energies in order to jump from a lower energy level to a higher energy level. As the electron moves to a higher energy level, its distance from the nucleus increases. The excited electron jumps to a lower energy level by the release of energy in the form of radiation. This is the emission spectra. Atomic spectra are also called line spectra because the emitted radiation is observed as a series of colored lines on a dark background. Atoms of two different elements cannot have the same spectral lines.