. What is ionization energy? How does it change as you go across a row in the periodic table? Be sure to use the coulombic attraction between electrons and the nucleus in your explanation. 2. How does ionization energy change as you go down a group in the periodic table? Be sure to use the coulombic attraction between electrons and the nucleus in your explanation.

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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1. What is ionization energy? How does it change as you go across a row in the periodic table? Be sure to use the coulombic attraction between electrons and the nucleus in your explanation.

2. How does ionization energy change as you go down a group in the periodic table? Be sure to use the coulombic attraction between electrons and the nucleus in your explanation.

Light emitting diodes work by creating an electrical circuit where electrons fall across
a "band gap" (i.e. they go from a high energy state to a low energy state). The larger
the gap, the more energy they emit when they fall. This energy is emitted as a photon
(i.e. a particle of light). The color of light generated by the LED is directly related to
the size of the band gap. A large energy change results in blue light and small energy
changes results in red light.
Because LEDS made of pure elements can only emit light that is too high or too low
in energy for us to see, mixtures of elements must be used to create a band gap that
results in visible light. The table below summarizes the composition and properties of
three different elemental combinations used in LEDS.
Table 1: Composition and Properties of LEDS
Element 1
Element 2
Size of Band Gap LED Color
Gallium
Nitrogen
Large
Blue
Gallium
Phosphorous
Medium
Green
Gallium
Arsenic
Small
Red
Transcribed Image Text:Light emitting diodes work by creating an electrical circuit where electrons fall across a "band gap" (i.e. they go from a high energy state to a low energy state). The larger the gap, the more energy they emit when they fall. This energy is emitted as a photon (i.e. a particle of light). The color of light generated by the LED is directly related to the size of the band gap. A large energy change results in blue light and small energy changes results in red light. Because LEDS made of pure elements can only emit light that is too high or too low in energy for us to see, mixtures of elements must be used to create a band gap that results in visible light. The table below summarizes the composition and properties of three different elemental combinations used in LEDS. Table 1: Composition and Properties of LEDS Element 1 Element 2 Size of Band Gap LED Color Gallium Nitrogen Large Blue Gallium Phosphorous Medium Green Gallium Arsenic Small Red
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