Question

Go through the first 20 elements in the chart. Note and record which orbital contains the additional electron. (The various orbitals are given in the upper right area of the Table.) The filling process is fairly straight forward to this point in the Periodic Table, but becomes a little more complex as outer orbitals are filled. Using a Word document you can write the electronic configurations by using the "superscript" function. Click on each element and write electronic configurations for elements number 21 through 36. What happens when going from Vanadium to Chromium? What happens when going from Nickel to Copper?

Answer 1

21	Scandium	[Ar]3d14s2
22	Titanium	[Ar]3d24s2
23	Vanadium	[Ar]3d34s2
24	Chromium	[Ar]3d54s1
25	Manganese	[Ar]3d54s2
26	Iron	[Ar]3d64s2
27	Cobalt	[Ar]3d74s2
28	Nickel	[Ar]3d84s2
29	Copper	[Ar]3d104s1
30	Zinc	[Ar]3d104s2
31	Gallium	[Ar]3d104s24p1
32	Germanium	[Ar]3d104s24p2
33	Arsenic	[Ar]3d104s24p3
34	Selenium	[Ar]3d104s24p4
35	Bromine	[Ar]3d104s24p5
36	Krypton	[Ar]3d104s24p6

the electronic configuration for Venedium,

Z = 23

1s²2s²2p⁶3s²3p⁶4s²3d³

the electronic configuration for Chromium,

Z = 24

1s²2s²2p⁶3s²3p⁶4s¹3d⁵  

and

sameway,

the electronic configuration for Nickel

Z = 28

1s²2s²2p⁶3s²3p⁶4s²3d⁸

the electronic configuration for Copper

Z = 29

1s²2s²2p⁶3s²3p⁶4s¹3d¹⁰

here electronic confguration gives the more stability for Chromium is more than the Venedium

and

for Copper than Nickel

because the half and fullfilled orbitals with electrons.