Electron affinity, Eca, is the change in energy that occurs when an electron is added to a neutral isolated atom. This can be represented by the following equation: Part A X(g) +e-→X(g) Consider the following neutral electron configurations in which n has a constant value. Which configuration would belong to the element with the most negative electron affinity, Eca? Most electron affinity values are negative because energy is usually released when a neutral atom gains an electron. Eea values become more • View Available Hint(s) negative with increasing tendency of the atom to accept an electron and increasing stability of the resulting anion. Eea shows a periodic trend that is related to electron configuration. Elements with less than an octet and with high effective nuclear charge (Zeff) tend to have large negative Eea values. O 5s2 O 5s²5p? O 5s²5p³ Elements with filled valence shells or subshells and low Zeff tend to have Eea values near zero. O 5s25p®

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Chapter1: Chemical Foundations
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Please answer question 19 part A and B

Electron affinity, Eea, is the change in energy that
occurs when an electron is added to a neutral
isolated atom. This can be represented by the
following equation:
Part A
X(g) +e¯→X(g)
Consider the following neutral electron configurations in which n has a constant value. Which configuration would belong to
the element with the most negative electron affinity, Eea?
Most electron affinity values are negative because
energy is usually released when a neutral atom
gains an electron. Eea values become more
negative with increasing tendency of the atom to
accept an electron and increasing stability of the
resulting anion. Eea shows a periodic trend that is
related to electron configuration. Elements with less
than an octet and with high effective nuclear charge
(Zeff) tend to have large negative Eea values.
• View Available Hint(s)
5s2
O
5s 5p?
O 5s*5p³
Elements with filled valence shells or subshells and
low Zeff tend to have Eea values near zero.
O 5s25p®
Transcribed Image Text:Electron affinity, Eea, is the change in energy that occurs when an electron is added to a neutral isolated atom. This can be represented by the following equation: Part A X(g) +e¯→X(g) Consider the following neutral electron configurations in which n has a constant value. Which configuration would belong to the element with the most negative electron affinity, Eea? Most electron affinity values are negative because energy is usually released when a neutral atom gains an electron. Eea values become more negative with increasing tendency of the atom to accept an electron and increasing stability of the resulting anion. Eea shows a periodic trend that is related to electron configuration. Elements with less than an octet and with high effective nuclear charge (Zeff) tend to have large negative Eea values. • View Available Hint(s) 5s2 O 5s 5p? O 5s*5p³ Elements with filled valence shells or subshells and low Zeff tend to have Eea values near zero. O 5s25p®
Part B
Arrange the following elements from greatest to least tendency to accept an electron.
Rank from greatest to least tendency to accept an electron. To rank items as equivalent, overlap them.
• View Available Hint(s)
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CI
S
Si
Na
Mg
Greatest tendency
Least tendency
The correct ranking cannot be determined.
Transcribed Image Text:Part B Arrange the following elements from greatest to least tendency to accept an electron. Rank from greatest to least tendency to accept an electron. To rank items as equivalent, overlap them. • View Available Hint(s) Reset Help CI S Si Na Mg Greatest tendency Least tendency The correct ranking cannot be determined.
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