ChemSphere

Every element,
up close.

Tap any of the 118 for its video lesson, a 3D model of its atom, the reactions it is known for, and where you meet it in everyday life. Swipe the table sideways to see it all.

1HHydrogen1.008
2HeHelium4.003
3LiLithium6.94
4BeBeryllium9.012
5BBoron10.81
6CCarbon12.011
7NNitrogen14.007
8OOxygen15.999
9FFluorine18.998
10NeNeon20.18
11NaSodium22.99
12MgMagnesium24.305
13AlAluminium26.982
14SiSilicon28.085
15PPhosphorus30.974
16SSulfur32.06
17ClChlorine35.45
18ArArgon39.948
19KPotassium39.098
20CaCalcium40.078
21ScScandium44.956
22TiTitanium47.867
23VVanadium50.942
24CrChromium51.996
25MnManganese54.938
26FeIron55.845
27CoCobalt58.933
28NiNickel58.693
29CuCopper63.546
30ZnZinc65.382
31GaGallium69.723
32GeGermanium72.631
33AsArsenic74.922
34SeSelenium78.972
35BrBromine79.904
36KrKrypton83.798
37RbRubidium85.468
38SrStrontium87.621
39YYttrium88.906
40ZrZirconium91.224
41NbNiobium92.906
42MoMolybdenum95.951
43TcTechnetium98
44RuRuthenium101.07
45RhRhodium102.91
46PdPalladium106.42
47AgSilver107.87
48CdCadmium112.41
49InIndium114.82
50SnTin118.71
51SbAntimony121.76
52TeTellurium127.6
53IIodine126.9
54XeXenon131.29
55CsCesium132.91
56BaBarium137.33
57LaLanthanum138.91
58CeCerium140.12
59PrPraseodymium140.91
60NdNeodymium144.24
61PmPromethium145
62SmSamarium150.36
63EuEuropium151.96
64GdGadolinium157.25
65TbTerbium158.93
66DyDysprosium162.5
67HoHolmium164.93
68ErErbium167.26
69TmThulium168.93
70YbYtterbium173.05
71LuLutetium174.97
72HfHafnium178.49
73TaTantalum180.95
74WTungsten183.84
75ReRhenium186.21
76OsOsmium190.23
77IrIridium192.22
78PtPlatinum195.08
79AuGold196.97
80HgMercury200.59
81TlThallium204.38
82PbLead207.21
83BiBismuth208.98
84PoPolonium209
85AtAstatine210
86RnRadon222
87FrFrancium223
88RaRadium226
89AcActinium227
90ThThorium232.04
91PaProtactinium231.04
92UUranium238.03
93NpNeptunium237
94PuPlutonium244
95AmAmericium243
96CmCurium247
97BkBerkelium247
98CfCalifornium251
99EsEinsteinium252
100FmFermium257
101MdMendelevium258
102NoNobelium259
103LrLawrencium266
104RfRutherfordium267
105DbDubnium268
106SgSeaborgium269
107BhBohrium270
108HsHassium269
109MtMeitnerium278
110DsDarmstadtium281
111RgRoentgenium282
112CnCopernicium285
113NhNihonium286
114FlFlerovium289
115McMoscovium289
116LvLivermorium293
117TsTennessine294
118OgOganesson294

Point at a family to pick out its members. marks elements with a video lesson.

Not sure where to start?

Four elements that explain a lot of the rest. Each page builds from the atom outward: its electrons, its reactions, then the places it turns up in your day.

The chemistry behind your day

Everyday moments modeled atom by atom: watch bonds break and form in 3D.

All 24 reactions

AP & IB Chemistry, made visible

Every unit with a simulator, practice questions and flashcards. Plus tutoring with Bhavya.

Bhavya’s research

Lab investigations, literature reviews and independent projects, each linked to the elements it studies. Look for the research marker on an element’s page.

3 projects, including published ACS workBrowse research