Electron Energy
Electron Energy - Related Videos
03:12
Ionization Energy
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2020
The amount of energy required to remove the most loosely bound electron from a gaseous atom in its ground state is called its first ionization energy (IE1). The first ionization energy for an element, X, is the energy required to form a cation with 1+ charge: The energy required to remove the second most loosely bound electron is called the second ionization energy (IE2). The energy required to remove the third electron is the third ionization energy, and so on. Energy is always required...
02:27
Energy Basics
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2020
Chemical reactions, such as those that occur when you light a match, involve changes in energy as well as matter. Chemical changes and their accompanying changes in energy are important parts of everyday life. The macronutrients in food undergo metabolic reactions that provide the energy to keep bodies functioning. A variety of fuels (gasoline, natural gas, coal) is burned to produce energy for transportation, heating, and the generation of electricity. Industrial chemical reactions use...
01:24
Electron Carriers
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2019
Electron carriers can be thought of as electron shuttles. These compounds can easily accept electrons (i.e., be reduced) or lose them (i.e., be oxidized). They play an essential role in energy production because cellular respiration is contingent on the flow of electrons. Over the many stages of cellular respiration, glucose breaks down into carbon dioxide and water. Electron carriers pick up electrons lost by glucose in these reactions, temporarily storing and releasing them into the electron...
08:15
Obtaining 3D Chemical Maps by Energy Filtered Transmission Electron Microscopy Tomography
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2018
This paper describes a protocol to achieve 3D chemical maps combining energy filtered imaging and electron tomography. The chemical distribution of two catalyst supports formed by elements that are difficult to distinguish by other imaging techniques was studied. Each application consists of mapping overlapped chemical elements - respectively spaced-ionization edges.
03:07
Electron Affinity
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2020
The electron affinity (EA) is the energy change for adding an electron to a gaseous atom to form an anion (negative ion). This process can be either endothermic or exothermic, depending on the element. Many of these elements have negative values of EA, which means that energy is released when the gaseous atom accepts an electron. However, for some elements, energy is required for the atom to become negatively charged, and the value of their EA is positive. Just as with ionization energy,...
FAQs
Electrons in atoms, molecules, and materials occupy quantized energy levels rather than a continuous range of positions. A transition occurs only when the electron absorbs or releases a specific amount of energy that matches the separation between levels. This restriction produces characteristic energy changes and helps explain why different substances show distinct electronic behavior.
Absorbing energy can move an electron to a higher energy level, producing excitation. When the electron returns to a lower level, it undergoes relaxation and releases energy. That release can produce light, creating an emission signal. These linked processes connect electron-energy changes with observable spectra and provide information about electronic states.
Electron energy helps describe how electrons participate in chemical bonding and how atoms or molecules respond during reactions. Changes in electronic states can affect the way a substance interacts with its surroundings, while energy measurements reveal aspects of its electronic structure. In chemistry, this connection supports efforts to relate electronic behavior to molecular reactivity.
Researchers measure electron energy using spectroscopy and related methods that examine energy changes associated with electrons. The resulting signals can reveal transitions between quantized levels and may include light released during relaxation. Interpreting these measurements helps investigators study electronic structure and distinguish substances according to their characteristic energy behavior.
Spectroscopic measurements can produce patterns associated with the electron-energy changes of a substance. Because electrons occupy quantized levels, the observed transitions provide clues about the substance’s electronic structure. Researchers can use these patterns to identify substances and investigate their properties, making electron energy a practical basis for chemical analysis.
Electron-energy changes provide evidence relevant to atomic spectra, ionization, chemical bonding, and molecular reactivity. Measurements can show how atoms or molecules respond when their electrons absorb or release energy. This information helps researchers connect observed signals with electronic structure and use that structure to interpret chemical behavior during reactions.