Week 5 | Atomic Structure | Flashcards

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Photoelectron spectroscopy

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A technique used to measure the energy needed to remove electrons from atoms or molecules, revealing information about their electronic structure.

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Atomic emission spectrum

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A set of specific wavelengths emitted by an element when its atoms are excited and then return to lower energy levels.

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Spectral line (band)

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A distinct line seen in an emission or absorption spectrum, representing a specific wavelength of light absorbed or emitted by an atom.

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Attraction

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A force that draws particles or objects together, such as the attraction between oppositely charged ions.

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Repulsion

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A force that pushes particles or objects apart, such as the repulsion between like-charged electrons.

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Energy level

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A fixed distance from the nucleus where electrons are likely to be found, associated with a specific amount of energy.

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Ground state

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The lowest energy state of an atom, where all electrons occupy the lowest possible energy levels.

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Excited state

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A higher energy state of an atom in which one or more electrons have absorbed energy and moved to a higher energy level.

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Ionization energy

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The energy required to remove an electron from an atom or ion in its gaseous state.

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Peak

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A point in a graph, often from photoelectron spectroscopy, indicating the energy associated with electrons at a particular binding energy.