APACE Science Home Periodic Table
group 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
period 1 1
H
2
He
period 2 3
Li
4
Be
5
B
6
C
7
N
8
O
9
F
10
Ne
period 3 11
Na
12
Mg
13
Al
14
Si
15
P
16
S
17
Cl
18
Ar
period 4 19
K
20
Ca
21
Sc
22
Ti
23
V
24
Cr
25
Mn
26
Fe
27
Co
28
Ni
29
Cu
30
Zn
31
Ga
32
Ge
33
As
34
Se
35
Br
36
Kr
period 5 37
Rb
38
Sr
39
Y
40
Zr
41
Nb
42
Mo
43
Tc
44
Ru
45
Rh
46
Pd
47
Ag
48
Cd
49
In
50
Sn
51
Sb
52
Te
53
I
54
Xe
period 6 55
Cs
56
Ba
71
Lu
72
Hf
73
Ta
74
W
75
Re
76
Os
77
Ir
78
Pt
79
Au
80
Hg
81
Tl
82
Pb
83
Bi
84
Po
85
At
86
Rn
period 7 87
Fr
88
Ra
103
Lr
104
Rf
105
Db
106
Sg
107
Bh
108
Hs
109
Mt
110
Uun
111
Uuu
112
Uub
113
  
114
Uuq
115
  
116
Uuh
117
  
118
Uuo
Lanthanoids  57
La
58
Ce
59
Pr
60
Nd
61
Pm
62
Sm
63
Eu
64
Gd
65
Tb
66
Dy
67
Ho
68
Er
69
Tm
70
Yb
Actinoids  89
Ac
90
Th
91
Pa
92
U
93
Np
94
Pu
95
Am
96
Cm
97
Bk
98
Cf
99
Es
100
Fm
101
Md
102
No

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