1st Edition

ISBN: 9781938168000

Author: Paul Peter Urone, Roger Hinrichs

Publisher: OpenStax College

Concept explainers

According to the Bohr model of an atom, the electron in an atom moves around a nucleus in fixed orbits with specific energies known as energy levels. The orbital energies are quantized. The electrons remain in these energy levels until they emit or absor…

Ruby Lasers

Lasers are devices that emit light using atoms or molecules at a certain wavelength and amplify the light to produce a narrow beam of radiation. It works as per the principle of electromagnetic radiation. Their source of emission contains the same freque…

Balmer Series

The spectrum of frequency observed when electromagnetic radiation is emitted from an atom when it goes from higher energy state to lower state, is known as emission spectrum. This transition occurs when an excited electron moves from higher to lower stat…

Emission Spectrum

Every state of matter tries to be at minimum potential energy or it can be said that the atoms of element/ substance arrange themselves such that overall energy is minimum.

Textbook Question

Chapter 30, Problem 20CQ

What is the difference between fluorescence and phosphorescence?

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Chapter 30, Problem 19CQ

Chapter 30, Problem 21CQ

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Explain whether the fluorescence occur at a shorter or a longer wavelength than the absorption by describing the mechanism of fluorescence with the help of an appropriate energy level diagram showing the transitions.

The energy-level diagram for the atomic emission spectra of an unknown gas is presented in the diagram below. n = 4 4.2 ev v G Color Wavelength Frequency Photon energy violet 380-450 nm 668-789 THz 2.75-3.26 eV n= 3 2.4 ev blue 450-495 nm 606-668 THz 2.50-2.75 ev n = 2 2.0 ev green 495-570 nm 526-606 THz 2.17-2.50 ev yellow 570-590 nm 508-526 THz 2.10-2.17 ev orange 590-620 nm 484-508 THz 2.00-2.10 ev red 620-750 nm 400-484 THz 1.65-2.00 ev n=1 O ev Part A Initially, electrons are in both the ground and first excited state (n=1 and n=2). A beam of light hits the gas. This beam is a continuous spectrum of yellow/green light (from 495 nm to 590 nm) How many absorption line/s will there be in the spectra? 2 Submit Previous Answers v Correct Part B Calculate the wavelength of the absorption lines. Separate answers by a comma. 1, 518,565 nm Part C After absorption of the yellow/green light, how many emission lines are possible? ? Submit Request Answer

What are the characteristics of the electron spectra of atoms and molecules?

Chapter 30 Solutions

College Physics

Ch. 30 - Name three different types of evidence for the...Ch. 30 - Explain why patterns observed in the periodic...Ch. 30 - If atoms exist, why can't we see them with visible...Ch. 30 - What two pieces of evidence allowed the first...Ch. 30 - How do the allowed orbits for electrons in atoms...Ch. 30 - How do the allowed orbits for electrons in atoms...Ch. 30 - Explain how Bohr's rule for the quantization of...Ch. 30 - What is a hydrogen-like atom, and how are the...Ch. 30 - Explain why characteristic x rays are the most...Ch. 30 - Why does the energy of characteristic x rays...

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