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Click on an element to learn more about it.   Atomic numbers in pink   Atomic masses in green

  s-block
  1

   wpe5.jpg (779 bytes) Alkali Metals
wpe6.jpg (780 bytes) Alkaline Earth Metals		 wpe9.jpg (785 bytes) Metalloids
wpeA.jpg (780 bytes) Nonmetals		   p-block (groups 13-18)

18

1.0
H
1

2

   wpe7.jpg (778 bytes) Transition Metals
wpe8.jpg (790 bytes) Other Metals		   wpeB.jpg (773 bytes) Noble Gases
   13 14 15 16 17

4.0
He
2

6.9
Li
3

9.0
Be
4

       d-block (groups 3 - 12)    

10.8
B
5

12.0
C
6

14.0
N
7

16.0
O
8

19.0
F
9

20.2
Ne
10

23.0
Na
11

24.3
Mg
12

 3 4 5 6 7 8 9 10 11 12

27.0
Al
13

28.1
Si
14

31.0
P
15

32.1
S
16

35.5
Cl
17

39.9
Ar
18

39.1
K
19

40.1
Ca
20

45.0
Sc
21

47.9
Ti
22

50.9
V
23

52.0
Cr
24

54.9
Mn
25

55.8
Fe
26

58.9
Co
27

58.7
Ni
28

63.5
Cu
29

65.4
Zn
30

69.7
Ga
31

72.6
Ge
32

74.9
As
33

79.0
Se
34

79.9
Br
35

83.8
Kr
36
85.5
Rb
37		 87.6
Sr
38		 88.9
Y
39		 91.2
Zr
40		 92.9
Nb
41		 95.9
Mo
42		 (98)
Tc
43		 101.1
Ru
44		 102.9
Rh
45		 106.4
Pd
46		 107.9
Ag
47		 112.4
Cd
48		 114.8
In
49		 118.7
Sn
50		 121.8
Sb
51		 127.6
Te
52		 126.9
I
53		 131.3
Xe
54
132.9
Cs
55		 137.3
Ba
56		 La-Lu
57-71		 178.5
Hf
72		 180.9
Ta
73		 183.9
W
74		 186.2
Re
75		 190.2
Os
76		 192.2
Ir
77		 195.1
Pt
78		 197.0
Au
79		 200.6
Hg
80		 204.4
Tl
81		 207.2
Pb
82		 209.0
Bi
83		 (209)
Po
84		 (210)
At
85		 (222)
Rn
86
(223)
Fr
87		 226.0
Ra
88		 Ac-Lr
89-103		 (261)
Rf
104		 (262)
Db
105		 (263)
Sg
106		 (262)
Bh
107		 (265)
Hs
108		 (266)
Mt
109		 (272)
Uun
110		 (272)
Uuu
111		 (277)
Uub
112		  

(289)
Uuq
114

  

 

  

 
                                   
        Lanthanoid Series                  
    138.9
La
57		 ---- 140.1
Ce
58		 140.9
Pr
59		 144.2
Nd
60		 (145)
Pm
61		 150.4
Sm
62		 152.0
Eu
63		 157.3
Gd
64		 158.9
Tb
65		 162.5
Dy
66		 164.9
Ho
67		 167.3
Er
68		 168.9
Tm
69		 173.0
Yb
70		 175.0
Lu
71
    227.0
Ac
89		 ---- 232.0
Th
90		 231.0
Pa
91		 238.0
U
92		 237.0
Np
93		 (244)
Pu
94		 (243)
Am
95		 (247)
Cm
96		 (247)
Bk
97		 (251)
Cf
98		 (252)
Es
99		 (257)
Fm
100		 (258)
Md
101		 (259)
No
102		 (260)
Lr
103
        Actinoid Series