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Chemistry

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Periodic table properties, molar mass, pH, and molarity calculations. Scroll down for the element reference table.

Periodic Table6

Atomic Number

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Given an element name or symbol, type its atomic number

Atomic Mass

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Given an element, type its atomic mass

Electron Config Count

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Count electrons in a specific shell or subshell

Valence Electrons

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How many valence electrons does this element have?

Oxidation State

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What is the most common oxidation state of this element?

All Periodic Table

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Mixed periodic table questions

Chemical Calculations6

Molar Mass

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Calculate the molar mass of a compound

pH Calculator

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Calculate pH from hydrogen ion concentration

Molarity

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Calculate solution concentration from mass, molar mass, and volume

Stoichiometry

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Calculate molar ratios from balanced equations

Gas Laws

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Boyle's, Charles's, Combined, and Ideal gas law

All Chemistry Calc

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Mixed chemistry calculations

Element Reference

Shells = electron count per shell (innermost first). Val. e⁻ = valence electrons. Ox. States = common oxidation states.

ZSymbolNameMassPeriodGroupShellsVal. e⁻Ox. StatesType
1HHydrogen1.00811[1]1+1, -1nonmetal
2HeHelium4.003118[2]20noble-gas
3LiLithium6.94121[2, 1]1+1metal
4BeBeryllium9.01222[2, 2]2+2metal
5BBoron10.810213[2, 3]3+3metalloid
6CCarbon12.011214[2, 4]4+4, -4nonmetal
7NNitrogen14.007215[2, 5]5-3, +3, +5nonmetal
8OOxygen15.999216[2, 6]6-2nonmetal
9FFluorine18.998217[2, 7]7-1nonmetal
10NeNeon20.180218[2, 8]80noble-gas
11NaSodium22.99031[2, 8, 1]1+1metal
12MgMagnesium24.30532[2, 8, 2]2+2metal
13AlAluminum26.982313[2, 8, 3]3+3metal
14SiSilicon28.086314[2, 8, 4]4+4, -4metalloid
15PPhosphorus30.974315[2, 8, 5]5-3, +3, +5nonmetal
16SSulfur32.060316[2, 8, 6]6-2, +4, +6nonmetal
17ClChlorine35.450317[2, 8, 7]7-1, +1, +5, +7nonmetal
18ArArgon39.948318[2, 8, 8]80noble-gas
19KPotassium39.09841[2, 8, 8, 1]1+1metal
20CaCalcium40.07842[2, 8, 8, 2]2+2metal
21ScScandium44.95643[2, 8, 9, 2]2+3metal
22TiTitanium47.86744[2, 8, 10, 2]2+4, +3, +2metal
23VVanadium50.94245[2, 8, 11, 2]2+5, +4, +3, +2metal
24CrChromium51.99646[2, 8, 13, 1]1+6, +3, +2metal
25MnManganese54.93847[2, 8, 13, 2]2+7, +4, +2metal
26FeIron55.84548[2, 8, 14, 2]2+3, +2metal
27CoCobalt58.93349[2, 8, 15, 2]2+3, +2metal
28NiNickel58.693410[2, 8, 16, 2]2+2metal
29CuCopper63.546411[2, 8, 18, 1]1+2, +1metal
30ZnZinc65.380412[2, 8, 18, 2]2+2metal
31GaGallium69.723413[2, 8, 18, 3]3+3metal
32GeGermanium72.630414[2, 8, 18, 4]4+4, +2metalloid
33AsArsenic74.922415[2, 8, 18, 5]5+5, +3, -3metalloid
34SeSelenium78.971416[2, 8, 18, 6]6-2, +4, +6nonmetal
35BrBromine79.904417[2, 8, 18, 7]7-1, +1, +5nonmetal
36KrKrypton83.798418[2, 8, 18, 8]80noble-gas
37RbRubidium85.46851[2, 8, 18, 8, 1]1+1metal
38SrStrontium87.62052[2, 8, 18, 8, 2]2+2metal
39YYttrium88.90653[2, 8, 18, 9, 2]2+3metal
40ZrZirconium91.22454[2, 8, 18, 10, 2]2+4metal
41NbNiobium92.90655[2, 8, 18, 12, 1]1+5, +3metal
42MoMolybdenum95.95056[2, 8, 18, 13, 1]1+6, +4, +2metal
43TcTechnetium98.00057[2, 8, 18, 13, 2]2+7, +4metal
44RuRuthenium101.07058[2, 8, 18, 15, 1]1+4, +3, +2metal
45RhRhodium102.91059[2, 8, 18, 16, 1]1+3, +1metal
46PdPalladium106.420510[2, 8, 18, 18]0+2, +4metal
47AgSilver107.870511[2, 8, 18, 18, 1]1+1metal
48CdCadmium112.410512[2, 8, 18, 18, 2]2+2metal
49InIndium114.820513[2, 8, 18, 18, 3]3+3metal
50SnTin118.710514[2, 8, 18, 18, 4]4+4, +2metal
51SbAntimony121.760515[2, 8, 18, 18, 5]5+5, +3, -3metalloid
52TeTellurium127.600516[2, 8, 18, 18, 6]6-2, +4, +6metalloid
53IIodine126.900517[2, 8, 18, 18, 7]7-1, +1, +5, +7nonmetal
54XeXenon131.290518[2, 8, 18, 18, 8]80noble-gas
55CsCesium132.91061[2, 8, 18, 18, 8, 1]1+1metal
56BaBarium137.33062[2, 8, 18, 18, 8, 2]2+2metal
72HfHafnium178.49064[2, 8, 18, 32, 10, 2]2+4metal
73TaTantalum180.95065[2, 8, 18, 32, 11, 2]2+5metal
74WTungsten183.84066[2, 8, 18, 32, 12, 2]2+6, +4metal
75ReRhenium186.21067[2, 8, 18, 32, 13, 2]2+7, +4metal
76OsOsmium190.23068[2, 8, 18, 32, 14, 2]2+4, +3metal
77IrIridium192.22069[2, 8, 18, 32, 15, 2]2+4, +3metal
78PtPlatinum195.080610[2, 8, 18, 32, 17, 1]1+4, +2metal
79AuGold196.970611[2, 8, 18, 32, 18, 1]1+3, +1metal
80HgMercury200.590612[2, 8, 18, 32, 18, 2]2+2, +1metal
81TlThallium204.380613[2, 8, 18, 32, 18, 3]3+3, +1metal
82PbLead207.200614[2, 8, 18, 32, 18, 4]4+4, +2metal
83BiBismuth208.980615[2, 8, 18, 32, 18, 5]5+3, +5metal
84PoPolonium209.000616[2, 8, 18, 32, 18, 6]6+4, +2metalloid
85AtAstatine210.000617[2, 8, 18, 32, 18, 7]7-1, +1metalloid
86RnRadon222.000618[2, 8, 18, 32, 18, 8]80noble-gas