QuestionJuly 8, 2025

Which of the following correctly represents the electron affinity of bromine? Br(g)arrow Br^+(g)+e^- Br_(2)(g)+e^-arrow Br^-(g) Br^+(g)+e^-arrow Br(g) Br(g)+e^-arrow Br^-(g)

Which of the following correctly represents the electron affinity of bromine? Br(g)arrow Br^+(g)+e^- Br_(2)(g)+e^-arrow Br^-(g) Br^+(g)+e^-arrow Br(g) Br(g)+e^-arrow Br^-(g)
Which of the following correctly represents the electron affinity of bromine?
Br(g)arrow Br^+(g)+e^-
Br_(2)(g)+e^-arrow Br^-(g)
Br^+(g)+e^-arrow Br(g)
Br(g)+e^-arrow Br^-(g)

Solution
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Answer

Br(g)+e^{-}\rightarrow Br^{-}(g) Explanation 1. Identify the definition of electron affinity Electron affinity is the energy change when an electron is added to a neutral atom in the gas phase. 2. Analyze each option Check which equation represents adding an electron to a neutral bromine atom (Br(g)). - Br(g)\rightarrow Br^{+}(g)+e^{-}: Represents ionization, not electron affinity. - Br_{2}(g)+e^{-}\rightarrow Br^{-}(g): Involves a molecule, not a single atom. - Br^{+}(g)+e^{-}\rightarrow Br(g): Represents gaining an electron by a positive ion, not a neutral atom. - Br(g)+e^{-}\rightarrow Br^{-}(g): Correctly represents adding an electron to a neutral bromine atom.

Explanation

1. Identify the definition of electron affinity<br /> Electron affinity is the energy change when an electron is added to a neutral atom in the gas phase.<br /><br />2. Analyze each option<br /> Check which equation represents adding an electron to a neutral bromine atom ($Br(g)$).<br /><br />- $Br(g)\rightarrow Br^{+}(g)+e^{-}$: Represents ionization, not electron affinity.<br />- $Br_{2}(g)+e^{-}\rightarrow Br^{-}(g)$: Involves a molecule, not a single atom.<br />- $Br^{+}(g)+e^{-}\rightarrow Br(g)$: Represents gaining an electron by a positive ion, not a neutral atom.<br />- $Br(g)+e^{-}\rightarrow Br^{-}(g)$: Correctly represents adding an electron to a neutral bromine atom.
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