6
6. The periodic table
1
1
2
3
4
5
6
7
1
3
4
5
6
7
Li
4
Be
6.94
9.01
11
12
Na
11
12
13
14
15
16
24.31
19
20
4.00
5
B
Relative atomic
mass
Ca
22
23
Sc
Ti
V
24
Cr
25
Mn
26
Fe
27
28
Co
Ni
29
Cu
30
Zn
6
C
7
N
8
O
14.01
16.00
16
19.00
17
20.18
15
26.98
28.09
32
30.97
33
32.07
35.45
39.95
34
35
69.72
49
72.63
74.92
78.96
50
51
52
31
Ga
Si
Ge
P
As
S
Se
Chemistry data booklet
44.96
47.87
50.94
52.00
54.94
55.85
58.93
58.69
63.55
65.38
38
39
40
41
42
43
44
45
46
47
48
85.47
87.62
88.91
91.22
92.91
95.96
(98)
112.41
121.76
127.60
72
73
74
75
78
79
80
114.82
81
118.71
57 †
102.91
77
107.87
56
101.07
76
106.42
55
82
83
132.91
137.33
138.91
178.49
180.95
183.84
186.21
190.23
196.97
200.59
204.38
207.20
88
89 ‡
104
105
106
107
108
192.22
109
195.08
87
110
111
112
113
114
(226)
(227)
(267)
(268)
(269)
(270)
(269)
(278)
(281)
(281)
(285)
†
Ce
Cs
Fr
(223)
Ba
Ra
La
Ac
‡
Zr
Hf
Rf
58
Nb
Ta
Db
59
Pr
Mo
W
Sg
60
Nd
Tc
Re
Bh
61
Pm
Ru
Os
Hs
62
Sm
Rh
Ir
Mt
63
Eu
Pd
Pt
Ds
64
Gd
Ag
Au
Rg
65
Tb
Cd
Hg
Cn
66
Dy
In
Tl
Uut
(286)
67
Ho
Sn
Pb
Uuq
(289)
68
Er
Cl
Br
126.90
85
131.29
84
208.98
(209)
(210)
(222)
115
116
117
Sb
Bi
Uup
(288)
69
Tm
Te
Po
Uuh
(293)
70
Yb
I
At
Uus
(294)
71
Lu
140.91
144.24
(145)
150.36
151.96
157.25
158.93
162.50
164.93
167.26
168.93
173.05
174.97
91
92
93
94
95
96
97
98
99
100
101
102
103
231.04
238.03
(257)
(258)
(259)
(262)
232.04
U
Np
(237)
Pu
(244)
Am
(243)
Cm
(247)
Bk
(247)
Cf
(251)
Es
(252)
Fm
36
Kr
83.90
90
Pa
18
Ar
79.90
53
140.12
Th
10
Ne
14
40.08
Y
F
12.01
37
Sr
9
10.81
13
Al
21
18
2
39.10
Rb
17
He
Mg
22.99
K
10
Element
1.01
2
9
Atomic number
H
3
8
Md
No
Lr
54
Xe
86
Rn
118
Uuo
(294)