1 H
Hydrogen
1.008
1
1s1
1+0=1
1-0-1=0
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2 He
Helium
4.0026
2
1s2
1+0=1
1-0-1=0
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Key:
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ZSymbol
Name
atomic weight
shells
valence
Madelung n+l
Radial Nodes n‑l‑1
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s
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p
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d
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f
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XIII
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XIV
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XV
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XVI
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XVII
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XVIII
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3 Li
Lithium
6.94
2 1
2s1
2+0=2
2-0-1=1
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4 Be
Berylium
9.0122
2 2
2s2
2+0=2
2-0-1=1
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5 B
Boron
10.81
2 3
2s22p1
2+1=3
2-1-1=0
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6 C
Carbon
12.011
2 4
2s22p2
2+1=3
2-1-1=0
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7 N
Nitrogen
14.007
2 5
2s22p3
2+1=3
2-1-1=0
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8 O
Oxygen
15.999
2 6
2s22p4
2+1=3
2-1-1=0
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9 F
Fluorine
18.998
2 7
2s22p5
2+1=3
2-1-1=0
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10 Ne
Neon
20.180
2 8
2s22p6
2+1=3
2-1-1=0
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11 Na
Sodium
22.990
2 8 1
3s1
3+0=3
3-0-1=2
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12 Mg
Magnesium
24.305
2 8 2
3s2
3+0=3
3-0-1=2
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III
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IV
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V
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VI
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VII
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VIII
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IX
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X
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XI
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XII
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13 Al
Aluminum
26.982
2 8 3
3s23p1
3+1=4
3-1-1=1
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14 Si
Silicon
28.085
2 8 4
3s23p2
3+1=4
3-1-1=1
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15 P
Phosphorus
30.974
2 8 5
3s23p3
3+1=4
3-1-1=1
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16 S
Sulfur
32.06
2 8 6
3s23p4
3+1=4
3-1-1=1
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17 Cl
Chlorine
35.45
2 8 7
3s23p5
3+1=4
3-1-1=1
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18 Ar
Argon
39.948
2 8 8
3s23p6
3+1=4
3-1-1=1
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19 K
Potassium
39.098
2 8 8 1
4s1
4+0=4
4-0-1=3
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20 Ca
Calcium
40.078
2 8 8 2
4s2
4+0=4
4-0-1=3
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21 Sc
Scandium
44.956
2 8 9 2
3d14s2
3+2=5
3-2-1=0
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22 Ti
Titanium
47.867
2 8 10 2
3d24s2
3+2=5
3-2-1=0
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23 V
Vanadium
50.942
2 8 11 2
3d34s2
3+2=5
3-2-1=0
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24 Cr
Chromium
51.996
2 8 13 1
3d54s1
3+2=5
3-2-1=0
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25 Mn
Manganese
54.938
2 8 13 2
3d54s2
3+2=5
3-2-1=0
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26 Fe
Iron
55.845
2 8 14 2
3d64s2
3+2=5
3-2-1=0
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27 Co
Cobalt
58.933
2 8 15 2
3d74s2
3+2=5
3-2-1=0
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28 Ni
Nickel
58.693
2 8 16 2
3d84s2
3+2=5
3-2-1=0
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29 Cu
Copper
63.546
2 8 18 1
3d104s1
3+2=5
3-2-1=0
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30 Zn
Zinc
65.38
2 8 18 2
3d104s2
3+2=5
3-2-1=0
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31 Ga
Gallium
69.723
2 8 18 3
4s24p1
4+1=5
4-1-1=2
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32 Ge
Germanium
72.630
2 8 18 4
4s24p2
4+1=5
4-1-1=2
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33 As
Arsenic
74.922
2 8 18 5
4s24p3
4+1=5
4-1-1=2
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34 Se
Selenium
78.971
2 8 18 6
4s24p4
4+1=5
4-1-1=2
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35 Br
Bromine
79.904
2 8 18 7
4s24p5
4+1=5
4-1-1=2
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36 Kr
Krypton
83.798
2 8 18 8
4s24p6
4+1=5
4-1-1=2
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37 Rb
Rubidium
85.468
2 8 18 8 1
5s1
5+0=5
5-0-1=4
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38 Sr
Strontium
87.62
2 8 18 8 2
5s2
5+0=5
5-0-1=4
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39 Y
Yttrium
88.906
2 8 18 9 2
4d15s2
4+2=6
4-2-1=1
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40 Zr
Zirconium
91.224
2 8 18 10 2
4d25s2
4+2=6
4-2-1=1
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41 Nb
Niobium
92.906
2 8 18 12 1
4d45s1
4+2=6
4-2-1=1
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42 Mo
Molybdenum
95.95
2 8 18 13 1
4d55s1
4+2=6
4-2-1=1
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43 Tc
Technetium
(97)
2 8 18 13 2
4d55s2
4+2=6
4-2-1=1
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44 Ru
Ruthenium
101.07
2 8 18 15 1
4d75s1
4+2=6
4-2-1=1
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45 Rh
Rhodium
102.91
2 8 18 16 1
4d85s1
4+2=6
4-2-1=1
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46 Pd
Palladium
106.42
2 8 18 18
4d10
4+2=6
4-2-1=1
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47 Ag
Silver
107.87
2 8 18 18 1
4d105s1
4+2=6
4-2-1=1
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48 Cd
Cadmium
112.41
2 8 18 18 2
4d105s2
4+2=6
4-2-1=1
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49 In
Indium
114.82
2 8 18 18 3
5s25p1
5+1=6
5-1-1=3
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50 Sn
Tin
118.71
2 8 18 18 4
5s25p2
5+1=6
5-1-1=3
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51 Sb
Antimony
121.76
2 8 18 18 5
5s25p3
5+1=6
5-1-1=3
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52 Te
Tellurium
127.60
2 8 18 18 6
5s25p4
5+1=6
5-1-1=3
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53 I
Iodine
126.90
2 8 18 18 7
5s25p5
5+1=6
5-1-1=3
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54 Xe
Xenon
131.29
2 8 18 18 8
5s25p6
5+1=6
5-1-1=3
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55 Cs
Cesium
132.915
2 8 18 18 8 1
6s1
6+0=6
6-0-1=5
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56 Ba
Barium
137.33
2 8 18 18 8 2
6s2
6+0=6
6-0-1=5
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57 La
Lanthanum
138.91
2 8 18 18 9 2
5d16s2
5+2=7
5-2-1=2
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58 Ce
Cerium
140.12
2 8 18 19 9 2
4f15d16s2
4+3=7
4-3-1=0
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59 Pr
Praseodymium
140.91
2 8 18 21 8 2
4f36s2
4+3=7
4-3-1=0
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60 Nd
Neodymium
144.24
2 8 18 22 8 2
4f46s2
4+3=7
4-3-1=0
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61 Pm
Promethium
(145)
2 8 18 23 8 2
4f56s2
4+3=7
4-3-1=0
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62 Sm
Samarium
150.36
2 8 18 24 8 2
4f66s2
4+3=7
4-3-1=0
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63 Eu
Europium
151.96
2 8 18 25 8 2
4f76s2
4+3=7
4-3-1=0
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64 Gd
Gadolinium
157.25
2 8 18 25 9 2
4f75d16s2
4+3=7
4-3-1=0
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65 Tb
Terbium
158.93
2 8 18 27 8 2
4f96s2
4+3=7
4-3-1=0
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66 Dy
Dysprosium
162.50
2 8 18 28 8 2
4f106s2
4+3=7
4-3-1=0
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67 Ho
Holmium
164.93
2 8 18 29 8 2
4f116s2
4+3=7
4-3-1=0
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68 Er
Erbium
167.26
2 8 18 30 8 2
4f126s2
4+3=7
4-3-1=0
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69 Tm
Thulium
168.93
2 8 18 32 8 1
4f136s2
4+3=7
4-3-1=0
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70 Yb
Ytterbium
173.05
2 8 18 32 8 2
4f146s2
4+3=7
4-3-1=0
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71 Lu
Lutetium
174.97
2 8 18 32 9 2
4f145d16s2
4+3=7
4-3-1=0
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72 Hf
Hafnium
178.49
2 8 18 32 10 2
5d26s2
5+2=7
5-2-1=2
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73 Ta
Tantalum
180.95
2 8 18 32 11 2
5d36s2
5+2=7
5-2-1=2
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74 W
Tungsten
183.84
2 8 18 32 12 2
5d46s2
5+2=7
5-2-1=2
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75 Re
Rhenium
186.21
2 8 18 32 13 2
5d56s2
5+2=7
5-2-1=2
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76 Os
Osmium
190.23
2 8 18 32 14 2
5d66s2
5+2=7
5-2-1=2
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77 Ir
Iridium
192.22
2 8 18 32 15 2
5d76s2
5+2=7
5-2-1=2
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78 Pt
Platinum
195.08
2 8 18 32 17 1
5d96s1
5+2=7
5-2-1=2
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79 Au
Gold
196.97
2 8 18 32 18 1
5d106s1
5+2=7
5-2-1=2
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80 Hg
Mercury
200.59
2 8 18 32 18 2
5d106s2
5+2=7
5-2-1=2
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81 Tl
Thallium
204.38
2 8 18 32 18 3
6s26p1
6+1=7
6-1-1=4
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82 Pb
Lead
207.2
2 8 18 32 18 4
6s26p2
6+1=7
6-1-1=4
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83 Bi
Bismuth
208.98
2 8 18 32 18 5
6s26p3
6+1=7
6-1-1=4
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84 Po
Polonium
(909)
2 8 18 32 18 6
6s26p4
6+1=7
6-1-1=4
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85 At
Astatine
(910)
2 8 18 32 18 7
6s26p5
6+1=7
6-1-1=4
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86 Rn
Radon
(222)
2 8 18 32 18 8
6s26p6
6+1=7
6-1-1=4
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87 Fr
Francium
(223)
2 8 18 32 18 8 1
7s1
7+0=7
7-0-1=6
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88 Ra
Radium
(226)
2 8 18 32 18 8 2
7s2
7+0=7
7-0-1=6
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89 Ac
Actinium
(227)
2 8 18 32 18 9 2
6d17s2
6+2=8
6-2-1=3
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90 Th
Thorium
232.04
2 8 18 32 18 10 2
5f06d27s2
5+3=8
5-3-1=1
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91 Pa
Protactinium
231.04
2 8 18 32 20 9 2
5f26d17s2
5+3=8
5-3-1=1
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92 U
Uranium
238.03
2 8 18 32 21 9 2
5f36d17s2
5+3=8
5-3-1=1
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93 Np
Neptunium
(237)
2 8 18 32 22 9 2
5f46d17s2
5+3=8
5-3-1=1
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94 Pu
Plutonium
(244)
2 8 18 32 24 8 2
5f67s2
5+3=8
5-3-1=1
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95 Am
Americium
(243)
2 8 18 32 25 8 2
5f77s2
5+3=8
5-3-1=1
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96 Cm
Curium
(247)
2 8 18 32 25 9 2
5f76d17s2
5+3=8
5-3-1=1
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97 Bk
Berkelium
(247)
2 8 18 32 27 8 2
5f97s2
5+3=8
5-3-1=1
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98 Cf
Californium
(251)
2 8 18 32 28 8 2
5f107s2
5+3=8
5-3-1=1
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99 Es
Einsteinium
(252)
2 8 18 32 29 8 2
5f117s2
5+3=8
5-3-1=1
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100 Fm
Fermium
(257)
2 8 18 32 30 8 2
5f127s2
5+3=8
5-3-1=1
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101 Md
Mendelevium
(258)
2 8 18 32 31 8 2
5f137s2
5+3=8
5-3-1=1
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102 No
Nobelium
(259)
2 8 18 32 32 8 2
5f147s2
5+3=8
5-3-1=1
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103 Lr
Lawrencium
(266)
2 8 18 32 32 8 3
5f147s27p1
5+3=8
5-3-1=1
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104  Rf
Rutherfordium
(267)
2 8 18 32 32 10 2
6d27s2
6+2=8
6-2-1=3
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105 Db
Dubnium
(268)
2 8 18 32 32 11 2
6d37s2
6+2=8
6-2-1=3
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106 Sg
Seaborgium
(269)
2 8 18 32 32 12 2
6d47s2
6+2=8
6-2-1=3
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107 Bh
Bohrium
(270)
2 8 18 32 32 13 2
6d57s2
6+2=8
6-2-1=3
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108 Hs
Hassium
(269)
2 8 18 32 32 14 2
6d67s2
6+2=8
6-2-1=3
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109 Mt
Meitnerium
(278)
2 8 18 32 32 15 2
6d77s2
6+2=8
6-2-1=3
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110 Ds
Darmstadtium
(281)
2 8 18 32 32 17 1
6d97s1
6+2=8
6-2-1=3
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111 Rg
Roentgenium
(282)
2 8 18 32 32 17 2
6d107s1
6+2=8
6-2-1=3
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112 Cn
Copernicium
(285)
2 8 18 32 32 18 2
6d107s2
6+2=8
6-2-1=3
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113 Nh
Nihonium
(286)
2 8 18 32 32 18 3
7s27p1
7+1=8
7-1-1=5
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114 Fl
Flerovium
(289)
2 8 18 32 32 18 4
7s27p2
7+1=8
7-1-1=5
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115 Mc
Moscovium
(289)
2 8 18 32 32 18 5
7s27p3
7+1=8
7-1-1=5
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116 Lv
Livermorium
(293)
2 8 18 32 32 18 6
7s27p4
7+1=8
7-1-1=5
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117 Ts
Tennessine
(294)
2 8 18 32 32 18 7
7s27p5
7+1=8
7-1-1=5
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118 Og
Oganesson
(294)
2 8 18 32 32 18 8
7s27p6
7+1=8
7-1-1=5
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119 Uue
Ununennium
2 8 18 32 32 18 8 1
8s1
8+0=8
8-0-1=7
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120 Ubn
Unbinilium
2 8 18 32 32 18 8 2
8s2
8+0=8
8-0-1=7
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19
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20
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21
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22
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23
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24
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25
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26
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27
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28
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29
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30
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31
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32
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9
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10
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11
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12
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13
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14
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15
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16
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17
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18
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3
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4
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5
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6
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7
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8
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