Identify the elements (two of these are irregular, so pay close attention). (a) 1s22s22p63s23p64s23d104p65s24d5 (b) [Xe]6s24f145d106p5 (c) 1s2 2s2 2p63s23p6 4s23d104p6 5s2 4d105p66s14f145d10 (d) [Rn]7s25f 76d1

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