QuestionJune 14, 2025

Which of the following ions of titanium would have the same electron configuration as Ar? & Answer: A & mathrm(Ti)^+ B & mathrm(Ti)^2+ C & mathrm(Ti)^3+ D & mathrm(Ti)^4+

Which of the following ions of titanium would have the same electron configuration as Ar? & Answer: A & mathrm(Ti)^+ B & mathrm(Ti)^2+ C & mathrm(Ti)^3+ D & mathrm(Ti)^4+
Which of the following ions of titanium would have the same electron configuration as Ar? & Answer: A & mathrm(Ti)^+ B & mathrm(Ti)^2+ C & mathrm(Ti)^3+ D & mathrm(Ti)^4+

Solution
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Answer

D Ti^{4+} Explanation 1. Determine the electron configuration of Argon Argon (Ar) has an atomic number of 18, so its electron configuration is 1s^2 2s^2 2p^6 3s^2 3p^6. 2. Determine the electron configuration of Titanium Titanium (Ti) has an atomic number of 22, so its electron configuration is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^2. 3. Calculate the electron configuration for each ion - Ti^{+} loses 1 electron: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 3d^2 - Ti^{2+} loses 2 electrons: 1s^2 2s^2 2p^6 3s^2 3p^6 3d^2 - Ti^{3+} loses 3 electrons: 1s^2 2s^2 2p^6 3s^2 3p^6 3d^1 - Ti^{4+} loses 4 electrons: 1s^2 2s^2 2p^6 3s^2 3p^6 4. Compare with Argon's electron configuration Ti^{4+} has the same electron configuration as Argon: 1s^2 2s^2 2p^6 3s^2 3p^6.

Explanation

1. Determine the electron configuration of Argon<br /> Argon (Ar) has an atomic number of 18, so its electron configuration is $1s^2 2s^2 2p^6 3s^2 3p^6$.<br /><br />2. Determine the electron configuration of Titanium<br /> Titanium (Ti) has an atomic number of 22, so its electron configuration is $1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^2$.<br /><br />3. Calculate the electron configuration for each ion<br /> <br />- $Ti^{+}$ loses 1 electron: $1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 3d^2$<br />- $Ti^{2+}$ loses 2 electrons: $1s^2 2s^2 2p^6 3s^2 3p^6 3d^2$<br />- $Ti^{3+}$ loses 3 electrons: $1s^2 2s^2 2p^6 3s^2 3p^6 3d^1$<br />- $Ti^{4+}$ loses 4 electrons: $1s^2 2s^2 2p^6 3s^2 3p^6$<br /><br />4. Compare with Argon's electron configuration<br /> $Ti^{4+}$ has the same electron configuration as Argon: $1s^2 2s^2 2p^6 3s^2 3p^6$.
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