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Question
Match the following species with their corresponding ground state electronic configuration.
| Atom / Ion | Electronic configuration |
| (i) \[\ce{Cu}\] | (a) 1s2 2s2 2p6 3s2 3p6 3d10 |
| (ii) \[\ce{Cu^{2+}}\] | (b) 1s2 2s2 2p6 3s2 3p6 3d10 4s2 |
| (iii) \[\ce{Zn^{2+}}\] | (c) 1s2 2s2 2p6 3s2 3p6 3d10 4s1 |
| (iv) \[\ce{Cr^{3+}}\] | (d) 1s2 2s2 2p6 3s2 3p6 3d9 |
| (e) 1s2 2s2 2p6 3s2 3p6 3d3 |
Solution
| Atom / Ion | Electronic configuration |
| (i) \[\ce{Cu}\] | (c) 1s2 2s2 2p6 3s2 3p6 3d10 4s1 |
| (ii) \[\ce{Cu^{2+}}\] | (d) 1s2 2s2 2p6 3s2 3p6 3d9 |
| (iii) \[\ce{Zn^{2+}}\] | (a) 1s2 2s2 2p6 3s2 3p6 3d10 |
| (iv) \[\ce{Cr^{3+}}\] | (e) 1s2 2s2 2p6 3s2 3p6 3d3 |
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