Chapter 6 - Electronic Structure of Atoms Flashcards
-Be able to calculate the wavelength of electromagnetic radiation give its frequency or its frequency given its wavelength -Be able to order the common kinds of radiation in the electromagnetic spectrum according to their wavelengths or energy -Understand the concept of photons, and be able to calculate their energies given either their frequency or wavelength -Be able to explain how line spectra of the elements relate to the idea of quantized energy states of electrons in atoms -Be familiar
6.1
Define “electromagnetic radiation (radiant energy)”.
A form of energy that has wave characteristics and that propagates through a vacuum at the characteristic speed of 3.00 x 10^8 m/s.
Ex. Visible light, infrared, UV, X-ray
6.1
Define “periodic”.
The pattern of peaks & troughs repeats itself at regular intervals.
6.1
Define “wavelength”.
The distance between 2 adjacent peaks or the distance between 2 adjacent troughs
6.1
Define “frequency”.
The number of completely wavelengths, or cycles, that pass a given point each second
6.1
Define the relationship between the speed of light, wavelength, and frequency in an equation.
c = λv
c = speed of light (3.00 x 10^8 m/s) λ = wavelength v = frequency (Hz, /s)
6.1 - Give It Some Thought (p. 215)
Our bodies are penetrated by X-rays but not by visible light. Is this because X-rays travel faster than visible light?
No. All electromagnetic radiation travels at 3.00 x 10^8 m/s.
6.1
Define the length of 1 Angstrom (A).
10^-10 meters
6.1
Define the length of 1 Nanometer (nm)
10^-9 meters
6.1
Define the length of 1 Micrometer (um)
10^-6 meters
6.1
What has the longer wavelength- red light or purple light?
Red light (750 nm). Purple light is only 400 nm.
6.1
Order these forms of electromagnetic radiation by increasing wavelength.
Radio frequency, microwave, visible light, infrared, UV, X Ray, Gamma ray
Gamma Rays, X Rays, UV, Visible, Infrared, Microwaves, Radio Frequency
