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Ch.2 - Atoms, Molecules & Ions
McMurry - Chemistry 8th Edition
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Tutti i libri di testoMcMurry 8th EditionCh.2 - Atoms, Molecules & IonsProblema 41c
Capitolo 2, Problema 41c

Which represents an F atom with one minus charge (F-)? (a)
(b)
(c)

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1
Identify the atomic number of fluorine (F) from the periodic table, which is 9.
Understand that a neutral fluorine atom has 9 protons and 9 electrons.
Recognize that an F atom with a one minus charge (F-) means it has gained an extra electron.
Calculate the total number of electrons in F- by adding one electron to the neutral atom's electron count, resulting in 10 electrons.
Conclude that F- has 9 protons and 10 electrons, representing a fluoride ion.

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Atomic Structure

An atom consists of a nucleus containing protons and neutrons, surrounded by electrons in various energy levels. The number of protons defines the element, while electrons determine its charge. For an F atom, there are 9 protons and typically 9 electrons, resulting in a neutral charge.
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02:10
Atom Structure

Ionic Charge

An ionic charge occurs when an atom gains or loses electrons, resulting in a net charge. An F atom with a one minus charge (F-) has gained an extra electron, bringing its total to 10 electrons. This additional electron gives the atom a negative charge, indicating it is an anion.
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01:53
Formal Charge

Electron Configuration

Electron configuration describes the distribution of electrons in an atom's orbitals. For a neutral fluorine atom, the configuration is 1s² 2s² 2p⁵. When it becomes F-, the configuration changes to 1s² 2s² 2p⁶, indicating a full outer shell, which is a stable arrangement.
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01:33
Electron Configuration Example
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