1
IA
2
IIA
3
IIIB
4
IVB
5
VB
6
VIB
7
VIIB
8
VIII
9
VIII
10
VIII
11
IB
12
IIB
13
IIIA
14
IVA
15
VA
16
VIA
17
VIIA
18
VIIIA
1 1
H
Idrogeno
2
He
Elio
2 3
Li
Litio
4
Be
Berillio
5
B
Boro
6
C
Carbonio
7
N
Azoto
8
O
Ossigeno
9
F
Fluoro
10
Ne
Neon
3 11
Na
Sodio
12
Mg
Magnesio
13
Al
Alluminio
14
Si
Silicio
15
P
Fosforo
16
S
Zolfo
17
Cl
Cloro
18
Ar
Argon
4 19
K
Potassio
20
Ca
Calcio
21
Sc
Scandio
22
Ti
Titanio
23
V
Vanadio
24
Cr
Cromo
25
Mn
Manganese
26
Fe
Ferro
27
Co
Cobalto
28
Ni
Nichel
29
Cu
Rame
30
Zn
Zinco
31
Ga
Gallio
32
Ge
Germanio
33
As
Arsenico
34
Se
Selenio
35
Br
Bromo
36
Kr
Kripton
5 37
Rb
Rubidio
38
Sr
Stronzio
39
Y
Ittrio
40
Zr
Zirconio
41
Nb
Niobio
42
Mo
Molibdeno
43
Tc
Tecnezio
44
Ru
Rutenio
45
Rh
Rodio
46
Pd
Palladio
47
Ag
Argento
48
Cd
Cadmio
49
In
Indio
50
Sn
Stagno
51
Sb
Antimonio
52
Te
Tellurio
53
I
Iodio
54
Xe
Xenon
6 55
Cs
Cesio
56
Ba
Bario
* 72
Hf
Afnio
73
Ta
Tantalio
74
W
Tungsteno
75
Re
Renio
76
Os
Osmio
77
Ir
Iridio
78
Pt
Platino
79
Au
Oro
80
Hg
Mercurio
81
Tl
Tallio
82
Pb
Piombo
83
Bi
Bismuto
84
Po
Polonio
85
At
Astato
86
Rn
Radon
7 87
Fr
Francio
88
Ra
Radio
** 104
Rf
Rutherfordio
105
Db
Dubnio
106
Sg
Seaborgio
107
Bh
Bohrio
108
Hs
Hassio
109
Mt
Meitnerio
110
Ds
Darmstadtio
111
Rg
Roentgenio
112
Cn
Copernicio
113
Nh
Nihonio
114
Fl
Flerovio
115
Mc
Moscovio
116
Lv
Livermorio
117
Ts
Tennesso
118
Og
Oganesson
8 119
Uue
Ununennium
120
Ubn
Unbinilium
121
Ubu
Unbiunium
*
Lantanoidi
57
La
Lantanio
58
Ce
Cerio
59
Pr
Praseodimio
60
Nd
Neodimio
61
Pm
Promezio
62
Sm
Samario
63
Eu
Europio
64
Gd
Gadolinio
65
Tb
Terbio
66
Dy
Disprosio
67
Ho
Olmio
68
Er
Erbio
69
Tm
Tulio
70
Yb
Itterbio
71
Lu
Lutezio
**
Attinoidi
89
Ac
Attinio
90
Th
Torio
91
Pa
Protoattinio
92
U
Uranio
93
Np
Nettunio
94
Pu
Plutonio
95
Am
Americio
96
Cm
Curio
97
Bk
Berkelio
98
Cf
Californio
99
Es
Einsteinio
100
Fm
Fermio
101
Md
Mendelevio
102
No
Nobelio
103
Lr
Laurenzio


Attinoidi Metalli alcalini Metalli alcalino terrosi Alogeni Lantanoidi Semimetalli Gas nobili Non metalli Metalli di post-transizione Elementi di transizione Sconosciuti


Tabella delle masse atomiche, delle elettronegatività e della configurazione elettronica
 SimboloNumero atomicoMassa atomicaElettronegativitàConfigurazione elettronica
IdrogenoH11.007942.201s¹
ElioHe24.002602 1s²
LitioLi36.9410.98[He] 2s¹
BerillioBe49.01218311.57[He] 2s²
BoroB510.812.04[He] 2s² 2p¹
CarbonioC612.0112.55[He] 2s² 2p²
AzotoN714.0073.04[He] 2s² 2p³
OssigenoO815.9993.44[He] 2s² 2p⁴
FluoroF918.9984031633.98[He] 2s² 2p⁵
NeonNe1020.1797 [He] 2s² 2p⁶
SodioNa1122.989769280.93[Ne] 3s¹
MagnesioMg1224.3051.31[Ne] 3s²
AlluminioAl1326.98153841.61[Ne] 3s² 3p¹
SilicioSi1428.0851.9[Ne] 3s² 3p²
FosforoP1530.9737619982.19[Ne] 3s² 3p³
ZolfoS1632.062.58[Ne] 3s² 3p⁴
CloroCl1735.453.16[Ne] 3s² 3p⁵
ArgonAr1839.948 [Ne] 3s² 3p⁶
PotassioK1939.09830.82[Ar] 4s¹
CalcioCa2040.0781[Ar] 4s²
ScandioSc2144.9559081.36[Ar] 3d¹ 4s²
TitanioTi2247.8671.54[Ar] 3d² 4s²
VanadioV2350.94151.63[Ar] 3d³ 4s²
CromoCr2451.99611.66[Ar] 3d⁵ 4s¹
ManganeseMn2554.9380431.55[Ar] 3d⁵ 4s²
FerroFe2655.8451.83[Ar] 3d⁶ 4s²
CobaltoCo2758.9331941.88[Ar] 3d⁷ 4s²
NichelNi2858.69341.91[Ar] 3d⁸ 4s²
RameCu2963.5461.9[Ar] 3d¹⁰ 4s¹
ZincoZn3065.381.65[Ar] 3d¹⁰ 4s²
GallioGa3169.7231.81[Ar] 3d¹⁰ 4s² 4p¹
GermanioGe3272.6302.01[Ar] 3d¹⁰ 4s² 4p²
ArsenicoAs3374.9215952.18[Ar] 3d¹⁰ 4s² 4p³
SelenioSe3478.9712.55[Ar] 3d¹⁰ 4s² 4p⁴
BromoBr3579.9042.96[Ar] 3d¹⁰ 4s² 4p⁵
KriptonKr3683.7983[Ar] 3d¹⁰ 4s² 4p⁶
RubidioRb3785.46780.82[Kr] 5s¹
StronzioSr3887.620.95[Kr] 5s²
IttrioY3988.905841.22[Kr] 4d¹ 5s²
ZirconioZr4091.2241.33[Kr] 4d² 5s²
NiobioNb4192.906371.6[Kr] 4d⁴ 5s¹
MolibdenoMo4295.952.16[Kr] 4d⁵ 5s¹
TecnezioTc43[98]1.9[Kr] 4d⁵ 5s²
RutenioRu44101.072.2[Kr] 4d⁷ 5s¹
RodioRh45102.905492.28[Kr] 4d⁸ 5s¹
PalladioPd46106.422.2[Kr] 4d¹⁰
ArgentoAg47107.86821.93[Kr] 4d¹⁰ 5s¹
CadmioCd48112.4141.69[Kr] 4d¹⁰ 5s²
IndioIn49114.8181.78[Kr] 4d¹⁰ 5s² 5p¹
StagnoSn50118.7101.96[Kr] 4d¹⁰ 5s² 5p²
AntimonioSb51121.7602.05[Kr] 4d¹⁰ 5s² 5p³
TellurioTe52127.602.1[Kr] 4d¹⁰ 5s² 5p⁴
IodioI53126.904472.66[Kr] 4d¹⁰ 5s² 5p⁵
XenonXe54131.2932.6[Kr] 4d¹⁰ 5s² 5p⁶
CesioCs55132.905451960.79[Xe] 6s¹
BarioBa56137.3270.89[Xe] 6s²
LantanioLa57138.905471.1[Xe] 5d¹ 6s²
CerioCe58140.1161.12[Xe] 4f¹ 5d¹ 6s²
PraseodimioPr59140.907661.13[Xe] 4f³ 6s²
NeodimioNd60144.2421.14[Xe] 4f⁴ 6s²
PromezioPm61[145]1.13[Xe] 4f⁵ 6s²
SamarioSm62150.361.17[Xe] 4f⁶ 6s²
EuropioEu63151.9641.2[Xe] 4f⁷ 6s²
GadolinioGd64157.251.2[Xe] 4f⁷ 5d¹ 6s²
TerbioTb65158.9253541.2[Xe] 4f⁹ 6s²
DisprosioDy66162.5001.22[Xe] 4f¹⁰ 6s²
OlmioHo67164.9303281.23[Xe] 4f¹¹ 6s²
ErbioEr68167.2591.24[Xe] 4f¹² 6s²
TulioTm69168.9342181.25[Xe] 4f¹³ 6s²
ItterbioYb70173.0451.1[Xe] 4f¹⁴ 6s²
LutezioLu71174.96681.27[Xe] 4f¹⁴ 5d¹ 6s²
AfnioHf72178.491.3[Xe] 4f¹⁴ 5d² 6s²
TantalioTa73180.947881.5[Xe] 4f¹⁴ 5d³ 6s²
TungstenoW74183.842.36[Xe] 4f¹⁴ 5d⁴ 6s²
RenioRe75186.2071.9[Xe] 4f¹⁴ 5d⁵ 6s²
OsmioOs76190.232.2[Xe] 4f¹⁴ 5d⁶ 6s²
IridioIr77192.2172.2[Xe] 4f¹⁴ 5d⁷ 6s²
PlatinoPt78195.0842.28[Xe] 4f¹⁴ 5d⁹ 6s¹
OroAu79196.9665702.54[Xe] 4f¹⁴ 5d¹⁰ 6s¹
MercurioHg80200.5922[Xe] 4f¹⁴ 5d¹⁰ 6s²
TallioTl81204.381.62[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p¹
PiomboPb82207.21.87[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p²
BismutoBi83208.980402.02[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p³
PolonioPo84[209]2.0[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁴
AstatoAt85[210]2.2[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁵
RadonRn86[222]2.2[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶
FrancioFr87[223]0.7[Rn] 7s¹
RadioRa88[226]0.9[Rn] 7s²
AttinioAc89[227]1.1[Rn] 6d¹ 7s²
TorioTh90232.03771.3[Rn] 6d² 7s²
ProtoattinioPa91231.035881.5[Rn] 5f² 6d¹ 7s²
UranioU92238.028911.38[Rn] 5f³ 6d¹ 7s²
NettunioNp93[237]1.36[Rn] 5f⁴ 6d¹ 7s²
PlutonioPu94[244]1.28[Rn] 5f⁶ 7s²
AmericioAm95[243]1.13[Rn] 5f⁷ 7s²
CurioCm96[247]1.28[Rn] 5f⁷ 6d¹ 7s²
BerkelioBk97[247]1.3[Rn] 5f⁹ 7s²
CalifornioCf98[251]1.3[Rn] 5f¹⁰ 7s²
EinsteinioEs99[252]1.3[Rn] 5f¹¹ 7s²
FermioFm100[257]1.3[Rn] 5f¹² 7s²
MendelevioMd101[258]1.3[Rn] 5f¹³ 7s²
NobelioNo102[259]1.3[Rn] 5f¹⁴ 7s²
LaurenzioLr103[266]1.3[Rn] 5f¹⁴ 7s² 7p¹
RutherfordioRf104[267] [Rn] 5f¹⁴ 6d² 7s²
DubnioDb105[268] [Rn] 5f¹⁴ 6d³ 7s²
SeaborgioSg106[269] [Rn] 5f¹⁴ 6d⁴ 7s²
BohrioBh107[270] [Rn] 5f¹⁴ 6d⁵ 7s²
HassioHs108[270] [Rn] 5f¹⁴ 6d⁶ 7s²
MeitnerioMt109[278] [Rn] 5f¹⁴ 6d⁷ 7s²
DarmstadtioDs110[281] [Rn] 5f¹⁴ 6d⁸ 7s²
RoentgenioRg111[282] [Rn] 5f¹⁴ 6d⁹ 7s²
CopernicioCn112[285] [Rn] 5f¹⁴ 6d¹⁰ 7s²
NihonioNh113[286] [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p¹
FlerovioFl114[289] [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p²
MoscovioMc115[290] [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p³
LivermorioLv116[293] [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁴
TennessoTs117[294] [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵
OganessonOg118[294] [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶
UnunenniumUue1193150.86[Og] 8s¹
UnbiniliumUbn1202990.91[Og] 8s²
UnbiuniumUbu121None [Og] 8s² 8p¹



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