Periodic Table of Elements
This periodic table shows element symbols, atomic numbers, and atomic weights. Click on an element symbol for more information about that element.| 1 IA 1A |
18 VIIIA 8A |
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| 1 H 1.008 |
2 IIA 2A |
13 IIIA 3A |
14 IVA 4A |
15 VA 5A |
16 VIA 6A |
17 VIIA 7A |
2 He 4.003 |
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| 3 Li 6.941 |
4 Be 9.012 |
5 B 10.81 |
6 C 12.01 |
7 N 14.01 |
8 O 16.00 |
9 F 19.00 |
10 Ne 20.18 |
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| 11 Na 22.99 |
12 Mg 24.31 |
3 IIIB 3B |
4 IVB 4B |
5 VB 5B |
6 VIB 6B |
7 VIIB 7B |
8 ← ← |
9 VIII 8 |
10 → → |
11 IB 1B |
12 IIB 2B |
13 Al 26.98 |
14 Si 28.09 |
15 P 30.97 |
16 S 32.07 |
17 Cl 35.45 |
18 Ar 39.95 |
| 19 K 39.10 |
20 Ca 40.08 |
21 Sc 44.96 |
22 Ti 47.88 |
23 V 50.94 |
24 Cr 52.00 |
25 Mn 54.94 |
26 Fe 55.85 |
27 Co 58.47 |
28 Ni 58.69 |
29 Cu 63.55 |
30 Zn 65.39 |
31 Ga 69.72 |
32 Ge 72.59 |
33 As 74.92 |
34 Se 78.96 |
35 Br 79.90 |
36 Kr 83.80 |
| 37 Rb 85.47 |
38 Sr 87.62 |
39 Y 88.91 |
40 Zr 91.22 |
41 Nb 92.91 |
42 Mo 95.94 |
43 Tc (98) |
44 Ru 101.1 |
45 Rh 102.9 |
46 Pd 106.4 |
47 Ag 107.9 |
48 Cd 112.4 |
49 In 114.8 |
50 Sn 118.7 |
51 Sb 121.8 |
52 Te 127.6 |
53 I 126.9 |
54 Xe 131.3 |
| 55 Cs 132.9 |
56 Ba 137.3 |
* | 72 Hf 178.5 |
73 Ta 180.9 |
74 W 183.9 |
75 Re 186.2 |
76 Os 190.2 |
77 Ir 190.2 |
78 Pt 195.1 |
79 Au 197.0 |
80 Hg 200.5 |
81 Tl 204.4 |
82 Pb 207.2 |
83 Bi 209.0 |
84 Po (210) |
85 At (210) |
86 Rn (222) |
| 87 Fr (223) |
88 Ra (226) |
** | 104 Rf (257) |
105 Db (260) |
106 Sg (263) |
107 Bh (265) |
108 Hs (265) |
109 Mt (266) |
110 Ds (271) |
111 Rg (272) |
112 Cn (277) |
113 Uut -- |
114 Uuq (296) |
115 Uup -- |
116 Uuh (298) |
117 Uus -- |
118 Uuo -- |
| * Lanthanide Series |
57 La 138.9 |
58 Ce 140.1 |
59 Pr 140.9 |
60 Nd 144.2 |
61 Pm (147) |
62 Sm 150.4 |
63 Eu 152.0 |
64 Gd 157.3 |
65 Tb 158.9 |
66 Dy 162.5 |
67 Ho 164.9 |
68 Er 167.3 |
69 Tm 168.9 |
70 Yb 173.0 |
71 Lu 175.0 |
| ** Actinide Series |
89 Ac (227) |
90 Th 232.0 |
91 Pa (231) |
92 U (238) |
93 Np (237) |
94 Pu (242) |
95 Am (243) |
96 Cm (247) |
97 Bk (247) |
98 Cf (249) |
99 Es (254) |
100 Fm (253) |
101 Md (256) |
102 No (254) |
103 Lr (257) |
| Alkali Metal |
Alkaline Earth |
Semi-Metal | Halogen | Noble Gas |
| Non Metal | Basic Metal | Transition Metal |
Lanthanide | Actinide |
The periodic table arranges the chemical elements into a pattern so that you can predict the properties of elements based on where they are located on the table. Elements are arranged from left to right and from top to bottom in order of increasing atomic number or number of protons in the element.
Rows of elements are called periods. The period number of an element signifies the highest unexcited energy level for an electron in that element. The number of elements in a period increases as you move down the periodic table because there are more sublevels per level as the energy level of the atom increases.
Columns of elements help define element groups. Elements within a group share several common properties.
More Element Information
- Mendeleev's Original Periodic Table
- Element Photo Gallery
- Alphabetical List of Elements
- Element Symbol Quiz
- Element Names Spelling Quiz
- Periodic Table Quiz
- Timeline of Element Discovery
- Trends (Periodicity) in the Periodic Table
- Introduction to the Periodic Table
- Element Types - Chemistry of Groups
- Lanthanides & Actinides
- What Are the Elements in the Human Body?
- What Is the Most Abundant Element?
