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                                  1. WebElements Home WebElements

                                    The periodic table of the elements

                                    网络斗地主下载The periodic table is an arrangment of the chemical elements ordered by atomic number so that periodic properties of the elements (chemical periodicity) are made clear.

                                    Explore the chemical elements through this periodic table

                                    Group 1 2   3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
                                    Period
                                    1
                                    1
                                    1.008
                                    Hydrogen
                                    2
                                    4.0026
                                    Helium
                                    2
                                    3
                                    6.94
                                    Lithium
                                    4
                                    9.0122
                                    Beryllium
                                    5
                                    10.81
                                    Boron
                                    6
                                    12.011
                                    Carbon
                                    7
                                    14.007
                                    Nitrogen
                                    8
                                    15.999
                                    Oxygen
                                    9
                                    18.998
                                    Fluorine
                                    10
                                    20.180
                                    Neon
                                    3
                                    11
                                    22.990
                                    Sodium
                                    12
                                    24.305
                                    Magnesium
                                    13
                                    26.982
                                    Aluminium
                                    14
                                    28.085
                                    Silicon
                                    15
                                    30.974
                                    Phosphorus
                                    16
                                    S
                                    32.06
                                    Sulfur
                                    17
                                    35.45
                                    Chlorine
                                    18
                                    39.948
                                    Argon
                                    4
                                    19
                                    39.098
                                    Potassium
                                    20
                                    40.078
                                    Calcium
                                    21
                                    44.956
                                    Scandium
                                    22
                                    47.867
                                    Titanium
                                    23
                                    50.942
                                    Vanadium
                                    24
                                    51.996
                                    Chromium
                                    25
                                    54.938
                                    Manganese
                                    26
                                    55.845
                                    Iron
                                    27
                                    58.933
                                    Cobalt
                                    28
                                    58.693
                                    Nickel
                                    29
                                    63.546
                                    Copper
                                    30
                                    65.38
                                    Zinc
                                    31
                                    69.723
                                    Gallium
                                    32
                                    72.630
                                    Germanium
                                    33
                                    74.922
                                    Arsenic
                                    34
                                    78.971
                                    Selenium
                                    35
                                    79.904
                                    Bromine
                                    36
                                    83.798
                                    Krypton
                                    5
                                    37
                                    85.468
                                    Rubidium
                                    38
                                    87.62
                                    Strontium
                                    39
                                    88.906
                                    Yttrium
                                    40
                                    91.224
                                    Zirconium
                                    41
                                    92.906
                                    Niobium
                                    42
                                    95.95
                                    Molybdenum
                                    43
                                    Tc
                                    96.906
                                    Technetium
                                    44
                                    101.07
                                    Ruthenium
                                    45
                                    102.91
                                    Rhodium
                                    46
                                    106.42
                                    Palladium
                                    47
                                    107.87
                                    Silver
                                    48
                                    112.41
                                    Cadmium
                                    49
                                    114.82
                                    Indium
                                    50
                                    118.71
                                    Tin
                                    51
                                    121.76
                                    Antimony
                                    52
                                    127.60
                                    Tellurium
                                    53
                                    126.90
                                    Iodine
                                    54
                                    131.29
                                    Xenon
                                    6
                                    55
                                    132.91
                                    Caesium
                                    56
                                    137.33
                                    Barium
                                    *
                                    71
                                    174.97
                                    Lutetium
                                    72
                                    178.49
                                    Hafnium
                                    73
                                    180.95
                                    Tantalum
                                    74
                                    183.84
                                    Tungsten
                                    75
                                    186.21
                                    Rhenium
                                    76
                                    190.23
                                    Osmium
                                    77
                                    192.22
                                    Iridium
                                    78
                                    195.08
                                    Platinum
                                    79
                                    196.97
                                    Gold
                                    80
                                    200.59
                                    Mercury
                                    81
                                    204.38
                                    Thallium
                                    82
                                    207.2
                                    Lead
                                    83
                                    208.98
                                    Bismuth
                                    84
                                    Po
                                    208.98
                                    Polonium
                                    85
                                    At
                                    209.99
                                    Astatine
                                    86
                                    Rn
                                    222.02
                                    Radon
                                    7
                                    87
                                    Fr
                                    223.02
                                    Francium
                                    88
                                    Ra
                                    226.03
                                    Radium
                                    **
                                    103
                                    Lr
                                    262.11
                                    Lawrencium
                                    104
                                    Rf
                                    267.12
                                    Rutherfordium
                                    105
                                    Db
                                    270.13
                                    Dubnium
                                    106
                                    Sg
                                    269.13
                                    Seaborgium
                                    107
                                    Bh
                                    270.13
                                    Bohrium
                                    108
                                    Hs
                                    269.13
                                    Hassium
                                    109
                                    Mt
                                    278.16
                                    Meitnerium
                                    110
                                    Ds
                                    281.17
                                    Darmstadtium
                                    111
                                    Rg
                                    281.17
                                    Roentgenium
                                    112
                                    Cn
                                    285.18
                                    Copernicium
                                    113
                                    Nh
                                    286.18
                                    Nihonium
                                    114
                                    Fl
                                    289.19
                                    Flerovium
                                    115
                                    Mc
                                    289.20
                                    Moscovium
                                    116
                                    Lv
                                    293.20
                                    Livermorium
                                    117
                                    Ts
                                    293.21
                                    Tennessine
                                    118
                                    Og
                                    294.21
                                    Oganesson
                                     
                                    *Lanthanoids *
                                    57
                                    138.91
                                    Lanthanum
                                    58
                                    140.12
                                    Cerium
                                    59
                                    140.91
                                    Praseodymium
                                    60
                                    144.24
                                    Neodymium
                                    61
                                    Pm
                                    144.91
                                    Promethium
                                    62
                                    150.36
                                    Samarium
                                    63
                                    151.96
                                    Europium
                                    64
                                    157.25
                                    Gadolinium
                                    65
                                    158.93
                                    Terbium
                                    66
                                    162.50
                                    Dysprosium
                                    67
                                    164.93
                                    Holmium
                                    68
                                    167.26
                                    Erbium
                                    69
                                    168.93
                                    Thulium
                                    70
                                    173.05
                                    Ytterbium
                                    **Actinoids **
                                    89
                                    Ac
                                    227.03
                                    Actinium
                                    90
                                    Th
                                    232.04
                                    Thorium
                                    91
                                    Pa
                                    231.04
                                    Protactinium
                                    92
                                    U
                                    238.03
                                    Uranium
                                    93
                                    Np
                                    237.05
                                    Neptunium
                                    94
                                    Pu
                                    244.06
                                    Plutonium
                                    95
                                    Am
                                    243.06
                                    Americium
                                    96
                                    Cm
                                    247.07
                                    Curium
                                    97
                                    Bk
                                    247.07
                                    Berkelium
                                    98
                                    Cf
                                    251.08
                                    Californium
                                    99
                                    Es
                                    252.08
                                    Einsteinium
                                    100
                                    Fm
                                    257.10
                                    Fermium
                                    101
                                    Md
                                    258.10
                                    Mendelevium
                                    102
                                    No
                                    259.10
                                    Nobelium

                                    The standard form of the periodic table shown here includes periods (shown horizontally) and groups (shown vertically). The properties of elements in groups are similar in some respects to each other.

                                    There is no one single or best structure for the periodic table but by whatever consensus there is, the form used here is very useful and the most common. The periodic table is a masterpiece of organised chemical information and the evolution of chemistry's periodic table into the current form is an astonishing achievement.

                                    网络斗地主下载The International Union of Pure and Applied Chemistry (IUPAC) confirmed the names of elements 113, 115, 117, and 118 as:

                                    This followed a 5-month period of public review after which the names earlier proposed by the discoverers were approved by IUPAC.

                                    You can buy this periodic table poster and more at the WebElements periodic table shop.
                                    Periodic table cartograms poster

                                    On 1 May 2014 a paper published in by J. Khuyagbaatar and others states the superheavy element with atomic number Z = 117 (ununseptium) was produced as an evaporation residue in the 48Ca and 249Bk fusion reaction at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. The radioactive decay of evaporation residues and their α-decay products was studied using a detection setup that allows measurement of decays of single atomic nuclei with very short half-lives. Two decay chains comprising seven α-decays and a spontaneous fission each were identified and assigned to the isotope 294Uus (element 117) and its decay products.

                                    Images of various periodic tables

                                    Click on the images below to see images of the periodic table in a variety of styles.

                                    Icon showing a standard periodic table
                                    See standard periodic table images.

                                    Icon showing a spiral periodic table
                                    See image of spiral periodic tables.

                                    Icon showing a circular periodic table
                                    See images of circular periodic tables.

                                    Icon showing extended periodic tables
                                    See images of extended periodic table.

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