Mendeleev فارسی

List of the 118 Elements of the Mendeleev Periodic Table

The periodic table arranges the chemical elements by atomic number. This page lists all 118 known elements with their name, symbol, atomic number, atomic mass and category; click a name to see its properties, electron configuration and uses, or use the interactive periodic table.

Browse by group and period

Periodic table groups

Group 1Group 2Group 3Group 4Group 5Group 6Group 7Group 8Group 9Group 10Group 11Group 12Group 13Group 14Group 15Group 16Group 17Group 18

Periodic table periods

Period 1Period 2Period 3Period 4Period 5Period 6Period 7

What is electron configuration?

Alkali metals (6 elements)

The alkali metals are the group 1 elements (excluding hydrogen): soft, shiny and highly reactive metals that react violently with water and are never found free in nature.

Lithium (Li)Sodium (Na)Potassium (K)Rubidium (Rb)Cesium (Cs)Francium (Fr)

Alkali metals page

Alkaline earth metals (6 elements)

The alkaline earth metals are the group 2 elements: reactive metals, harder than the alkali metals and with higher melting points, that usually form ions with a +2 charge.

Beryllium (Be)Magnesium (Mg)Calcium (Ca)Strontium (Sr)Barium (Ba)Radium (Ra)

Alkaline earth metals page

Transition metals (38 elements)

The transition metals are the d-block elements: usually good conductors of heat and electricity, with several oxidation states, and they form colourful compounds and important catalysts.

Scandium (Sc)Titanium (Ti)Vanadium (V)Chromium (Cr)Manganese (Mn)Iron (Fe)Cobalt (Co)Nickel (Ni)Copper (Cu)Zinc (Zn)Yttrium (Y)Zirconium (Zr)Niobium (Nb)Molybdenum (Mo)Technetium (Tc)Ruthenium (Ru)Rhodium (Rh)Palladium (Pd)Silver (Ag)Cadmium (Cd)Hafnium (Hf)Tantalum (Ta)Tungsten (W)Rhenium (Re)Osmium (Os)Iridium (Ir)Platinum (Pt)Gold (Au)Mercury (Hg)Rutherfordium (Rf)Dubnium (Db)Seaborgium (Sg)Bohrium (Bh)Hassium (Hs)Meitnerium (Mt)Darmstadtium (Ds)Roentgenium (Rg)Copernicium (Cn)

Transition metals page

Lanthanides (15 elements)

The lanthanides are the 15 elements from lanthanum to lutetium, part of the f-block, with very similar chemical properties; they are often grouped among the “rare earths”.

Lanthanum (La)Cerium (Ce)Praseodymium (Pr)Neodymium (Nd)Promethium (Pm)Samarium (Sm)Europium (Eu)Gadolinium (Gd)Terbium (Tb)Dysprosium (Dy)Holmium (Ho)Erbium (Er)Thulium (Tm)Ytterbium (Yb)Lutetium (Lu)

Lanthanides page

Actinides (15 elements)

The actinides are the 15 elements from actinium to lawrencium, part of the f-block, and all of them are radioactive.

Actinium (Ac)Thorium (Th)Protactinium (Pa)Uranium (U)Neptunium (Np)Plutonium (Pu)Americium (Am)Curium (Cm)Berkelium (Bk)Californium (Cf)Einsteinium (Es)Fermium (Fm)Mendelevium (Md)Nobelium (No)Lawrencium (Lr)

Actinides page

Post-transition metals (12 elements)

The p-block metals (the post-transition metals) are usually softer than the transition metals and have lower melting points.

Aluminum (Al)Gallium (Ga)Indium (In)Tin (Sn)Thallium (Tl)Lead (Pb)Bismuth (Bi)Polonium (Po)Nihonium (Nh)Flerovium (Fl)Moscovium (Mc)Livermorium (Lv)

Post-transition metals page

Metalloids (6 elements)

The metalloids have properties between metals and nonmetals, and many of them are semiconductors.

Boron (B)Silicon (Si)Germanium (Ge)Arsenic (As)Antimony (Sb)Tellurium (Te)

Metalloids page

Nonmetals (7 elements)

The nonmetals are usually poor conductors of heat and electricity and are brittle in solid form; they are the base elements of organic and biological chemistry.

Hydrogen (H)Carbon (C)Nitrogen (N)Oxygen (O)Phosphorus (P)Sulfur (S)Selenium (Se)

Nonmetals page

Halogens (6 elements)

The halogens are the group 17 elements: highly reactive nonmetals that form salt compounds with metals.

Fluorine (F)Chlorine (Cl)Bromine (Br)Iodine (I)Astatine (At)Tennessine (Ts)

Halogens page

Noble gases (7 elements)

The noble gases are the group 18 elements: their outer shell is full, so under normal conditions they are very unreactive.

Helium (He)Neon (Ne)Argon (Ar)Krypton (Kr)Xenon (Xe)Radon (Rn)Oganesson (Og)

Noble gases page

Table of all elements

Atomic no.SymbolNameAtomic massCategory
1HHydrogen1.008Nonmetal
2HeHelium4.0026Noble gas
3LiLithium6.94Alkali metal
4BeBeryllium9.0122Alkaline earth metal
5BBoron10.81Metalloid
6CCarbon12.011Nonmetal
7NNitrogen14.007Nonmetal
8OOxygen15.999Nonmetal
9FFluorine18.998Halogen
10NeNeon20.18Noble gas
11NaSodium22.99Alkali metal
12MgMagnesium24.305Alkaline earth metal
13AlAluminum26.982Metal
14SiSilicon28.085Metalloid
15PPhosphorus30.974Nonmetal
16SSulfur32.06Nonmetal
17ClChlorine35.45Halogen
18ArArgon39.95Noble gas
19KPotassium39.098Alkali metal
20CaCalcium40.078Alkaline earth metal
21ScScandium44.956Transition metal
22TiTitanium47.867Transition metal
23VVanadium50.942Transition metal
24CrChromium51.996Transition metal
25MnManganese54.938Transition metal
26FeIron55.845Transition metal
27CoCobalt58.933Transition metal
28NiNickel58.693Transition metal
29CuCopper63.546Transition metal
30ZnZinc65.38Transition metal
31GaGallium69.723Metal
32GeGermanium72.63Metalloid
33AsArsenic74.922Metalloid
34SeSelenium78.96Nonmetal
35BrBromine79.904Halogen
36KrKrypton83.798Noble gas
37RbRubidium85.468Alkali metal
38SrStrontium87.62Alkaline earth metal
39YYttrium88.906Transition metal
40ZrZirconium91.224Transition metal
41NbNiobium92.906Transition metal
42MoMolybdenum95.95Transition metal
43TcTechnetium98Transition metal
44RuRuthenium101.07Transition metal
45RhRhodium102.91Transition metal
46PdPalladium106.42Transition metal
47AgSilver107.87Transition metal
48CdCadmium112.41Transition metal
49InIndium114.82Metal
50SnTin118.71Metal
51SbAntimony121.76Metalloid
52TeTellurium127.6Metalloid
53IIodine126.9Halogen
54XeXenon131.29Noble gas
55CsCesium132.91Alkali metal
56BaBarium137.33Alkaline earth metal
57LaLanthanum138.91Lanthanide
58CeCerium140.12Lanthanide
59PrPraseodymium140.91Lanthanide
60NdNeodymium144.24Lanthanide
61PmPromethium145Lanthanide
62SmSamarium150.36Lanthanide
63EuEuropium151.96Lanthanide
64GdGadolinium157.25Lanthanide
65TbTerbium158.93Lanthanide
66DyDysprosium162.5Lanthanide
67HoHolmium164.93Lanthanide
68ErErbium167.26Lanthanide
69TmThulium168.93Lanthanide
70YbYtterbium173.05Lanthanide
71LuLutetium174.97Lanthanide
72HfHafnium178.49Transition metal
73TaTantalum180.95Transition metal
74WTungsten183.84Transition metal
75ReRhenium186.21Transition metal
76OsOsmium190.23Transition metal
77IrIridium192.22Transition metal
78PtPlatinum195.08Transition metal
79AuGold196.97Transition metal
80HgMercury200.59Transition metal
81TlThallium204.38Metal
82PbLead207.2Metal
83BiBismuth208.98Metal
84PoPolonium209Metal
85AtAstatine210Halogen
86RnRadon222Noble gas
87FrFrancium223Alkali metal
88RaRadium226Alkaline earth metal
89AcActinium227Actinide
90ThThorium232.04Actinide
91PaProtactinium231.04Actinide
92UUranium238.03Actinide
93NpNeptunium237Actinide
94PuPlutonium244Actinide
95AmAmericium243Actinide
96CmCurium247Actinide
97BkBerkelium247Actinide
98CfCalifornium251Actinide
99EsEinsteinium252Actinide
100FmFermium257Actinide
101MdMendelevium258Actinide
102NoNobelium259Actinide
103LrLawrencium262Actinide
104RfRutherfordium267Transition metal
105DbDubnium268Transition metal
106SgSeaborgium269Transition metal
107BhBohrium270Transition metal
108HsHassium269Transition metal
109MtMeitnerium278Transition metal
110DsDarmstadtium281Transition metal
111RgRoentgenium282Transition metal
112CnCopernicium285Transition metal
113NhNihonium286Metal
114FlFlerovium289Metal
115McMoscovium290Metal
116LvLivermorium293Metal
117TsTennessine294Halogen
118OgOganesson294Noble gas