Portal:Featured content/Lists/Periodic table (large version)

From Wikipedia, the free encyclopedia
Jump to: navigation, search

This is a large version of the periodic table and contains the symbol, atomic number, and mean atomic mass value for the natural isotopic composition of each element. The periodic table of the chemical elements is a tabular method of displaying the chemical elements. Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869.

The current standard table contains 117 confirmed elements as of 2008-01-27 (while element 118 has been synthesized, element 117 has not).

Table[edit]

Group → 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
↓ Period IA IIA IIIB IVB VB VIB VIIB VIIIB VIIIB VIIIB IB IIB IIIA IVA VA VIA VIIA VIIIA
1 Hydrogen
1
H

1.0079
isotopes
Name of element
Atomic number
Chemical symbol

Relative atomic mass 

Helium
2
He

4.0026
isotopes
2 Lithium
3
Li

6.941(2)
isotopes
Beryllium
4
Be

9.0122
isotopes
Boron
5
B

10.811(7)
isotopes
Carbon
6
C

12.011
isotopes
Nitrogen
7
N

14.007
isotopes
Oxygen
8
O

15.999
isotopes
Fluorine
9
F

18.998
isotopes
Neon
10
Ne

20.180
isotopes