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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.

                            The International Union of Pure and Applied Chemistry (IUPAC) confirmed the names of elements 113, 115, 117, and 118 as:

                            网络斗地主下载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

                            网络斗地主下载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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