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Reference Tables





The Periodic Table of the Elements




1
1.007 +1 Alkali metals (1) Metals
Period 1 H Alkaline earth metals (2)
1 Metalloid elements
1

2 Transition metals (3 – 12) Nonmetals
6.941 +1 9.012 +2
Li Be Halogens (17)

Period 2 3 4 Noble gases (18)
2-1
2-2

22.989 +1 24.305 +2
Na Mg
Period 3 11 12 Group
2-8-1
2-8-2
3


4 5 6 7 8 9



39.09 +1 40.08 +2 44.9559 +3 47.88 +2 50.9414 +2 51.996 +2 54.938 +2 55.847 +2 58.933 +2
Sc
K
Ca

+3
V +3
Ti +3
Cr +3
Mn Fe +3 Co +3

Period 4 19 20 21 22 +4 23 24 +6 25 26 27
+4
+4
2-8-8-1 2-8-8-2 2-8-9-2 2-8-10-2 2-8-11-2 +5 2-8-13-1 2-8-13-2 +7 2-8-14-2 2-8-15-2














85.468 +1 87.62 +2 88.905 +3 91.224 +4 92.906 +3 95.94 +3 (98) +3 101.07 +3 102.906 +3
+5
Period 5 Rb Sr Y Zr Nb Mo +6 Tc +6 Ru Rh
37 38 39 40 41 42 43 +7 44 45
2-8-18-8-2
2-8-18-8-1
2-8-18-10-2
2-8-18-9-2
2-8-18-15-1
2-8-18-14-1
2-8-18-16-1
2-8-18-13-1
132.91 +1 137.33 +2 138.906 +3 178.49 +4 2-8-18-12-1 183.85 +6 183.85 +4 190.2 +3 192.22 +3






180.948 +5
Period 6 Cs Ba La Hf Ta W Re +6 Os +4 Ir +4
55 56 57 72 73 74 75 +7 76 77
-18-32-13-2
-18-32-12-2
2-8-18-18-8-1 2-8-18-18-8-2 2-8-18-18-9-2 *18-32-10-2
-18-32-15-2
-18-32-14-2
-18-32-11-2

(223) +1 226.025 +2 227.028 +3 (261) (262) (266) (272) (277) (276)
Ac
Ra
Fr
Period 7 Rf Db Sg Bh Hs Mt
87 88 89 104 105 106 107 108 109
-18-32-18-8-1

-18-32-18-8-2 -18-32-18-9-2

* denotes the presence of (2-8-) for 104.12 +3 140.908 +3 144.24 +3 (145) +3 150.36 +2

elements 72 and above Ce Pr Nd Pm Sm +3

**The systematic names and Rare Earth metals 58 59 60 61 62




symbols for elements of atomic 232.038 +4 231.036 +4 238.029 +3 237.029 +3 (244) +3

numbers 113 and above Th +5 +4

will be used until the approval of 90 Pa U Np +4 Pu +4
+5

trivial names by IUPAC. 91 92 93 +5 94 +5
+6 +6 +6

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