Chapter 4: Problem 118

True or false? The \(\mathrm{O}^{2-}\) and \(\mathrm{F}^{-}\) anions have identical electron configurations. Justify your answer with Bohr diagrams and electron configuration notation.

Short Answer

Expert verified

True. The O²⁻ and F⁻ anions have identical electron configurations, as both have the electron configuration 1s²2s²2p⁶. The Bohr diagrams of both anions also show the same number of electrons in each energy level, with 2 electrons in the first energy level (1s²) and 8 electrons in the second energy level (2s²2p⁶).

Step by step solution

1. Electron Configuration of O²⁻ Ion

First, let's find the electron configuration for O²⁻ ion. An oxygen atom has 8 electrons, and its electron configuration is 1s²2s²2p⁴. However, the O²⁻ ion has gained 2 extra electrons, making it a total of 10 electrons. Therefore, we need to find the electron configuration with 10 electrons. 1s²2s²2p⁶ So, the electron configuration of O²⁻ anion is 1s²2s²2p⁶.

2. Electron Configuration of F⁻ Ion

Next, let's find the electron configuration for F⁻ ion. A fluorine atom has 9 electrons, so its electron configuration is 1s²2s²2p⁵. However, the F⁻ ion has gained 1 extra electron, making it a total of 10 electrons. Therefore, we need to find the electron configuration with 10 electrons. 1s²2s²2p⁶ So, the electron configuration of F⁻ anion is 1s²2s²2p⁶.

3. Comparison of Electron Configurations

Now that we have the electron configurations for both O²⁻ and F⁻ anions, let's compare them: O²⁻: 1s²2s²2p⁶ F⁻: 1s²2s²2p⁶ Both anions have the same electron configuration.

4. Bohr Diagrams of O²⁻ and F⁻ Anions

Next, we will represent the O²⁻ and F⁻ anions using Bohr diagrams: O²⁻: In the first energy level, there are 2 electrons (1s²). In the second energy level, there are 8 electrons (2s²2p⁶). F⁻: In the first energy level, there are 2 electrons (1s²). In the second energy level, there are 8 electrons (2s²2p⁶). Both Bohr diagrams show that the O²⁻ and F⁻ anions have the same electron configuration with the same number of electrons in each energy level.

Conclusion

Since both the electron configuration notation and the Bohr diagrams of O²⁻ and F⁻ anions are identical, we can conclude that the statement is true: The O²⁻ and F⁻ anions have identical electron configurations.

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True or false? The \(\mathrm{O}^{2-}\) and \(\mathrm{F}^{-}\) anions have identical electron configurations. Justify your answer with Bohr diagrams and electron configuration notation.

Short Answer

Step by step solution

1. Electron Configuration of O²⁻ Ion

2. Electron Configuration of F⁻ Ion

3. Comparison of Electron Configurations

4. Bohr Diagrams of O²⁻ and F⁻ Anions

Conclusion

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