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

Answer 1

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