1st page
1) Sodium: 1s22s22p63s1
2) Iron: 1s22s22p63s23p64s23d6
3) Bromine: 1s22s22p63s23p64s23d104p5
4) Barium: 1s22s22p63s23p64s23d104p65s24d105p66s2
5) Neptunium: 1s22s22p63s23p64s23d104p65s24d105p66s24f145d106p67s25f5
6) Cobalt: [Ar]4s23d7
7) Silver: [Kr]5s24d9
8) Tellurium: [Kr]5s24d105p4
9) Radium: [Rn]7s2
10) Lawrencium: [Rn]7s25f146d1
11) Sulfur
12) Rubidium
13) Antimony
14) Osmium
15) Einsteinium
16) Not valid (the d-orbital does not begin with energy level 4, but 3)
17) Not valid (the 3rd s-orbit has 3 electrons, which is not possible, and the 3rd d-orbit does not fill after 3s)
18) Not valid (the short cut is only valid with noble gases, and Ra is not a noble gas)
19) Valid
20) Not valid (if you write the configuration for a noble gas, you still must go back to the previous noble gas)
2nd page
Be: 1s22s2
Na: 1s22s22p63s1
K: 1s22s22p63s23p64s1
Zr: 1s22s22p63s23p64s23d104p65s24d2
Ag: 1s22s22p63s23p64s23d104p65s24d9
Sn2+: 1s22s22p63s23p64s23d104p65s24d10
Ti: [Ar]4s23d2
S: [Ne]3s23p4
Mn2+: [Ar]4s23d3
Br: [Ar]4s23d104p5
Zr: [Kr]5s24d2
Ba: [Xe]6s2
1. Helium: 1s2 (you cannot simply say [He], and there is no previous noble gas)
2. Nitrogen: [He]2s22p3
3. Chlorine (1- charge): [Ne]3s23p6
4. Iron: [Ar]4s23d6
5. Zinc: [Ar]4s23d10
6. Iodine (1- charge): [Kr]5s24d105p6
7. Cadmium (2+ charge): 1s22s22p63s23p64s23d104p65s24d8
3rd page
Helium: 1s2
Boron: 1s22s22p1
Oxygen: 1s22s22p4
Sodium: 1s22s22p63s1
Silicon: 1s22s22p63s23p2
Potassium: 1s22s22p63s23p64s1
Titanium: 1s22s22p63s23p64s23d2
Zirconium: 1s22s22p63s23p64s23d104p65s24d2
The remaining 3rd page and last page (orbital diagrams) I checked