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(a) Co, cobalt Full electron configuration = (do not use noble gas notation) Orbital box notation: 3s 3d Co is (b) Se, seleni
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Answer #1

a) Cobalt (Co) has atomic number of 27 and have the electron configuration of

1s22s22p63s23p64s23d7

For orbital notation please find the attached image file

Co is Transition metal

Selenium (Se) has atomic number of 34 and it is having argon (18Ar) as noble gas electron configuration but nearest noble gas is Krypton at 36.

Noble gas electron configuration of Ar is 1s22s22p63s23p6

Noble gas electron configuration of Kr is 1s22s22p63s23p63d104s24p6

electron configuration of Se is 1s22s22p63s23p63d104s24p4

For orbital notation please find the attached image file

Se is nonmetal

a) Orbital box notation of Cobalt (eo) is 11 10 11 12 13 14 14 15 16 17 14 [11/14 1 11 11 15 25 2P 33 3p 43 3d b) Orbital box

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