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Chapter 21: Problem 20

Write electron configurations for each of the following. a. \(\mathrm{Cr}, \mathrm{Cr}^{2+}, \mathrm{Cr}^{3+}\) b. \(\mathrm{Cu}, \mathrm{Cu}^{+}, \mathrm{Cu}^{2+}\) c. \(\mathrm{V}, \mathrm{V}^{2+}, \mathrm{V}^{3+}\)

Short Answer

Expert verified
a. Cr: \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}3d^{5}\), Cr虏鈦�: \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{4}\), Cr鲁鈦�: \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{3}\) b. Cu: \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}3d^{10}\), Cu鈦�: \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}\), Cu虏鈦�: \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{9}\) c. V: \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{3}\), V虏鈦�: \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{2}\), V鲁鈦�: \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{1}\)

Step by step solution

01

Determine the atomic number of the element

The atomic number of Chromium (Cr) is 24.
02

Write the electron configuration for Cr

Using the periodic table and applying the rules, we find the electron configuration of Chromium to be: \[1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}3d^{5}\]
03

Write the electron configuration for Cr虏鈦�

For the Cr虏鈦� ion, we need to remove two electrons. The electron configuration becomes: \[1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{4}\]
04

Write the electron configuration for Cr鲁鈦�

For the Cr鲁鈦� ion, we need to remove three electrons. The electron configuration becomes: \[1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{3}\] b. Cu, Cu鈦�, Cu虏鈦�
05

Determine the atomic number of the element

The atomic number of Copper (Cu) is 29.
06

Write the electron configuration for Cu

Using the periodic table and applying the rules, we find the electron configuration of Copper to be: \[1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}3d^{10}\]
07

Write the electron configuration for Cu鈦�

For the Cu鈦� ion, we need to remove one electron. The electron configuration becomes: \[1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}\]
08

Write the electron configuration for Cu虏鈦�

For the Cu虏鈦� ion, we need to remove two electrons. The electron configuration becomes: \[1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{9}\] c. V, V虏鈦�, V鲁鈦�
09

Determine the atomic number of the element

The atomic number of Vanadium (V) is 23.
10

Write the electron configuration for V

Using the periodic table and applying the rules, we find the electron configuration of Vanadium to be: \[1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{3}\]
11

Write the electron configuration for V虏鈦�

For the V虏鈦� ion, we need to remove two electrons. The electron configuration becomes: \[1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{2}\]
12

Write the electron configuration for V鲁鈦�

For the V鲁鈦� ion, we need to remove three electrons. The electron configuration becomes: \[1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{1}\]

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Most popular questions from this chapter

What is the lanthanide contraction? How does the lanthanide contraction affect the properties of the \(4 d\) and \(5 d\) transition metals?

. Which is more likely to be paramagnetic, \(\mathrm{Fe}(\mathrm{CN})_{6}^{4-}\) or \(\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}^{2+}\) ? Explain.

Name the following coordination compounds. a. \(\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Br}\right] \mathrm{Br}_{2}\) c. \(\left[\mathrm{Fe}\left(\mathrm{NH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{NH}_{2}\right)_{2}\left(\mathrm{NO}_{2}\right)_{2}\right] \mathrm{Cl}\) b. \(\mathrm{Na}_{3}\left[\mathrm{Co}(\mathrm{CN})_{6}\right]\) d. \(\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{I}_{2}\right]\left[\mathrm{PtI}_{4}\right]\)

a. In the absorption spectrum of the complex ion [Cr(NCS) \(\left._{6}\right]^{3-}\), there is a band corresponding to the absorption of a photon of light with an energy of \(1.75 \times 10^{4} \mathrm{~cm}^{-1}\). Given \(1 \mathrm{~cm}^{-1}=\) \(1.986 \times 10^{-23} \mathrm{~J}\), what is the wavelength of this photon? b. The \(\mathrm{Cr}-\mathrm{N}-\mathrm{C}\) bond angle in \(\left[\mathrm{Cr}(\mathrm{NCS})_{6}\right]^{3-}\) is predicted to be \(180^{\circ}\). What is the hybridization of the \(\mathrm{N}\) atom in the \(\mathrm{NCS}^{-}\) ligand when a Lewis acid-base reaction occurs between \(\mathrm{Cr}^{3+}\) and \(\mathrm{NCS}^{-}\) that would give a \(180^{\circ} \mathrm{Cr}-\mathrm{N}-\mathrm{C}\) bond angle? \(\left[\mathrm{Cr}(\mathrm{NCS})_{6}\right]^{3-}\) undergoes substitution by ethylenediammine (en) according to the equation \(\left[\mathrm{Cr}(\mathrm{NCS})_{6}\right]^{3-}+2 \mathrm{en} \longrightarrow\left[\mathrm{Cr}(\mathrm{NCS})_{2}(\mathrm{en})_{2}\right]^{+}+4 \mathrm{NCS}^{-}\) Does \(\left[\mathrm{Cr}(\mathrm{NCS})_{2}(\mathrm{en})_{2}\right]^{+}\) exhibit geometric isomerism? Does \(\left[\mathrm{Cr}(\mathrm{NCS})_{2}(\mathrm{en})_{2}\right]^{+}\) exhibit optical isomerism?

Which of the following ligands are capable of linkage isomerism? Explain your answer. $$\mathrm{SCN}^{-}, \mathrm{N}_{3}^{-}, \mathrm{NO}_{2}^{-}, \mathrm{NH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{NH}_{2}, \mathrm{OCN}^{-}, \mathrm{I}^{-}$$
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