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No Ato m
Nama Unsur
Simbol
Gol
Konfigurasi Elektron
1
Hydrogen
H
IA
1
2
Helium
He
VIIIA
2
3
Lithium
Li
IA
2–1
4
Beryllium
Be
IIA
2–2
5
Boron
B
IIIA
2–3
6
Carbon
C
IVA
2–4
7
Nitrogen
N
VA
2–5
8
Oxygen
O
VIA
2–6
9
Fluorine
F
VIIA
2–7
10
Neon
Ne
VIIIA
2–8
11
Sodium
Na
IA
2–8–1
12
Magnesium
Mg
IIA
2–8–2
13
Aluminum
Al
IIIA
2–8–3
14
Silicon
Si
IVA
2–8–4
15
Phosphorus
P
VA
2–8–5
16
Sulfur
S
VIA
2–8–6
17
Chlorine
Cl
VIIA
2–8–7
18
Argon
Ar
VIIIA
2–8–8
19
Potassium
K
IA
2–8–8–1
20
Calcium
Ca
IIA
2–8–8–2
21
Scandium
Sc
IIIB
2–8–9–2
22
Titanium
Ti
IVB
2–8–10–2
23
Vanadium
V
VB
2–8–11–2
24
Chromium
Cr
VIB
2–8–13–1
25
Manganese
Mn
VIIB
2–8–13–2
26
Iron
Fe
VIIIB
2–8–14–2
27
Cobalt
Co
VIIIB
2–8–15–2
28
Nickel
Ni
VIIIB
2–8–16–2
29
Copper
Cu
IB
2–8–18–1
30
Zinc
Zn
IIB
2–8–18–2
31
Gallium
Ga
IIIA
2–8–18–3
32
Germanium
Ge
IVA
2–8–18–4
33
Arsenic
As
VA
2–8–18–5
34
Selenium
Se
VIA
2–8–18–6
35
Bromine
Br
VIIA
2–8–18–7
36
Krypton
Kr
VIIIA
2–8–18–8
37
Rubidium
Rb
IA
2–8–18–8–1
38
Strontium
Sr
IIA
2–8–18–8–2
39
Yttrium
Y
IIIB
2–8–18–9–2
40
Zirconium
Zr
IVB
2–8–18–10–2
41
Niobium
Nb
VB
2–8–18–12–1
42
Molybdenum
Mo
VIB
2–8–18–13–1
43
Technetium
Tc
VIIB
2–8–18–13–2
44
Ruthenium
Ru
VIIIB
2–8–18–15–1
45
Rhodium
Rh
VIIIB
2–8–18–16–1
46
Palladium
Pd
VIIIB
2–8–18–18
47
Silver
Ag
IB
2–8–18–18–1
48
Cadmium
Cd
IIB
2–8–18–18–2
49
Indium
In
IIIA
2–8–18–18–3
50
Tin
Sn
IVA
2–8–18–18–4
51
Antimony
Sb
VA
2–8–18–18–5
52
Tellurium
Te
VIA
2–8–18–18–6
53
Iodine
I
VIIA
2–8–18–18–7
54
Xenon
Xe
VIIIA
2–8–18–18–8
55
Cesium
Cs
IA
2–8–18–18–8–1
56
Barium
Ba
IIA
2–8–18–18–8–2
57
Lanthanum
La
Lanthani des
2–8–18–18–9–2
58
Cerium
Ce
Lanthani des
2–8–18–19–9–2
59
Praseodymiu m
Pr
Lanthani des
2–8–18–21–8–2
60
Neodymium
Nd
Lanthani des
2–8–18–22–8–2
61
Promethium
Pm
Lanthani des
2–8–18–23–8–2
62
Samarium
Sm
Lanthani des
2–8–18–24–8–2
63
Europium
Eu
Lanthani des
2–8–18–25–8–2
64
Gadolinium
Gd
Lanthani des
2–8–18–25–9–2
65
Terbium
Tb
Lanthani des
2–8–18–27–8–2
98
Californium
Cf
Actinide s
2–8–18–32–28–8–2
66
Dysprosium
Dy
Lanthani des
2–8–18–28–8–2
99
Einsteinium
Es
Actinide s
2–8–18–32–29–8–2
67
Holmium
Ho
Lanthani des
2–8–18–29–8–2
100
Fermium
Fm
Actinide s
2–8–18–32–30–8–2
68
Erbium
Er
Lanthani des
2–8–18–30–8–2
101
Mendelevium
Md
Actinide s
2–8–18–32–31–8–2
69
Thulium
Tm
Lanthani des
2–8–18–31–8–2
102
Nobelium
No
Actinide s
2–8–18–32–32–8–2
70
Ytterbium
Yb
Lanthani des
2–8–18–32–8–2
103
Lawrencium
Lr
Actinide s
2–8–18–32–32–8–3
71
Lutetium
Lu
Lanthani des
2–8–18–32–9–2
104
Rutherfordiu m
Rf
IVB
2–8–18–32–32–10–2
72
Hafnium
Hf
IVB
2–8–18–32–10–2
105
Dubnium
Db
VB
2–8–18–32–32–11–2
73
Tantalum
Ta
VB
2–8–18–32–11–2
106
Seaborgium
Sg
VIB
2–8–18–32–32–12–2
74
Tungsten
W
VIB
2–8–18–32–12–2
107
Bohrium
Bh
VIIB
2–8–18–32–32–13–2
75
Rhenium
Re
VIIB
2–8–18–32–13–2
108
Hassium
Hs
VIIIB
2–8–18–32–32–14–2
76
Osmium
Os
VIIIB
2–8–18–32–14–2
109
Meitnerium
Mt
VIIIB
2–8–18–32–32–15–2
77
Iridium
Ir
VIIIB
2–8–18–32–15–2
110
Darmstadtium
Ds
VIIIB
2–8–18–32–32–17–1
78
Platinum
Pt
VIIIB
2–8–18–32–17–1
111
Roentgenium
Rg
IB
2–8–18–32–32–18–1
79
Gold
Au
IB
2–8–18–32–18–1
112
Copernicium
Cn
IIB
2–8–18–32–32–18–2
80
Mercury
Hg
IIB
2–8–18–32–18–2
113
Ununtrium
Uut
IIIA
2–8–18–32–32–18–3
81
Thallium
Tl
IIIA
2–8–18–32–18–3
114
Flerovium
Fl
IVA
2–8–18–32–32–18–4
82
Lead
Pb
IVA
2–8–18–32–18–4
115
Ununpentium
Uup
83
Bismuth
Bi
VA
2–8–18–32–18–5
116
Livermorium
Lv
84
Polonium
Po
VIA
2–8–18–32–18–6
117
Ununseptium
Uus
2–8–18–32–32–18–7
85
Astatine
At
VIIA
2–8–18–32–18–7
118
Ununoctium
Uuo
2–8–18–32–32–18–8
86
Radon
Rn
VIIIA
2–8–18–32–18–8
87
Francium
Fr
IA
2–8–18–32–18–8–1
88
Radium
Ra
IIA
2–8–18–32–18–8–2
89
Actinium
Ac
Actinide s
2–8–18–32–18–9–2
90
Thorium
Th
Actinide s
2–8–18–32–18–10–2
91
Protactinium
Pa
Actinide s
2–8–18–32–20–9–2
92
Uranium
U
Actinide s
2–8–18–32–21–9–2
93
Neptunium
Np
Actinide s
2–8–18–32–22–9–2
94
Plutonium
Pu
Actinide s
2–8–18–32–24–8–2
95
Americium
Am
Actinide s
2–8–18–32–25–8–2
96
Curium
Cm
Actinide s
2–8–18–32–25–9–2
97
Berkelium
Bk
Actinide s
2–8–18–32–27–8–2
2–8–18–32–32–18–5 VIA
2–8–18–32–32–18–6