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Side-by-Side Element Comparison (2–4 Elements)

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Chronological Discovery of the 118 Elements

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All 118 chemical elements

Open an element name for its permanent reference page. Select a tile above to explore its models and study tools.

Number	Symbol	Element	Atomic weight / [A]	Group	Period
1	H	Hydrogen	1.0080	1	1
2	He	Helium	4.0026	18	1
3	Li	Lithium	6.94	1	2
4	Be	Beryllium	9.0122	2	2
5	B	Boron	10.81	13	2
6	C	Carbon	12.011	14	2
7	N	Nitrogen	14.007	15	2
8	O	Oxygen	15.999	16	2
9	F	Fluorine	18.998	17	2
10	Ne	Neon	20.180	18	2
11	Na	Sodium	22.990	1	3
12	Mg	Magnesium	24.305	2	3
13	Al	Aluminium	26.982	13	3
14	Si	Silicon	28.085	14	3
15	P	Phosphorus	30.974	15	3
16	S	Sulfur	32.06	16	3
17	Cl	Chlorine	35.45	17	3
18	Ar	Argon	39.95	18	3
19	K	Potassium	39.098	1	4
20	Ca	Calcium	40.078	2	4
21	Sc	Scandium	44.956	3	4
22	Ti	Titanium	47.867	4	4
23	V	Vanadium	50.942	5	4
24	Cr	Chromium	51.996	6	4
25	Mn	Manganese	54.938	7	4
26	Fe	Iron	55.845	8	4
27	Co	Cobalt	58.933	9	4
28	Ni	Nickel	58.693	10	4
29	Cu	Copper	63.546	11	4
30	Zn	Zinc	65.38	12	4
31	Ga	Gallium	69.723	13	4
32	Ge	Germanium	72.630	14	4
33	As	Arsenic	74.922	15	4
34	Se	Selenium	78.971	16	4
35	Br	Bromine	79.904	17	4
36	Kr	Krypton	83.798	18	4
37	Rb	Rubidium	85.468	1	5
38	Sr	Strontium	87.62	2	5
39	Y	Yttrium	88.906	3	5
40	Zr	Zirconium	91.222	4	5
41	Nb	Niobium	92.906	5	5
42	Mo	Molybdenum	95.95	6	5
43	Tc	Technetium	[98]	7	5
44	Ru	Ruthenium	101.07	8	5
45	Rh	Rhodium	102.91	9	5
46	Pd	Palladium	106.42	10	5
47	Ag	Silver	107.87	11	5
48	Cd	Cadmium	112.41	12	5
49	In	Indium	114.82	13	5
50	Sn	Tin	118.71	14	5
51	Sb	Antimony	121.76	15	5
52	Te	Tellurium	127.60	16	5
53	I	Iodine	126.90	17	5
54	Xe	Xenon	131.29	18	5
55	Cs	Caesium	132.91	1	6
56	Ba	Barium	137.33	2	6
57	La	Lanthanum	138.91	3	6
58	Ce	Cerium	140.12	Lanthanoid (f-block)	6
59	Pr	Praseodymium	140.91	Lanthanoid (f-block)	6
60	Nd	Neodymium	144.24	Lanthanoid (f-block)	6
61	Pm	Promethium	[145]	Lanthanoid (f-block)	6
62	Sm	Samarium	150.36	Lanthanoid (f-block)	6
63	Eu	Europium	151.96	Lanthanoid (f-block)	6
64	Gd	Gadolinium	157.25	Lanthanoid (f-block)	6
65	Tb	Terbium	158.93	Lanthanoid (f-block)	6
66	Dy	Dysprosium	162.50	Lanthanoid (f-block)	6
67	Ho	Holmium	164.93	Lanthanoid (f-block)	6
68	Er	Erbium	167.26	Lanthanoid (f-block)	6
69	Tm	Thulium	168.93	Lanthanoid (f-block)	6
70	Yb	Ytterbium	173.05	Lanthanoid (f-block)	6
71	Lu	Lutetium	174.97	Lanthanoid (f-block)	6
72	Hf	Hafnium	178.49	4	6
73	Ta	Tantalum	180.95	5	6
74	W	Tungsten	183.84	6	6
75	Re	Rhenium	186.21	7	6
76	Os	Osmium	190.23	8	6
77	Ir	Iridium	192.22	9	6
78	Pt	Platinum	195.08	10	6
79	Au	Gold	196.97	11	6
80	Hg	Mercury	200.59	12	6
81	Tl	Thallium	204.38	13	6
82	Pb	Lead	207.2	14	6
83	Bi	Bismuth	208.98	15	6
84	Po	Polonium	[209]	16	6
85	At	Astatine	[210]	17	6
86	Rn	Radon	[222]	18	6
87	Fr	Francium	[223]	1	7
88	Ra	Radium	[226]	2	7
89	Ac	Actinium	[227]	3	7
90	Th	Thorium	232.04	Actinoid (f-block)	7
91	Pa	Protactinium	231.04	Actinoid (f-block)	7
92	U	Uranium	238.03	Actinoid (f-block)	7
93	Np	Neptunium	[237]	Actinoid (f-block)	7
94	Pu	Plutonium	[244]	Actinoid (f-block)	7
95	Am	Americium	[243]	Actinoid (f-block)	7
96	Cm	Curium	[247]	Actinoid (f-block)	7
97	Bk	Berkelium	[247]	Actinoid (f-block)	7
98	Cf	Californium	[251]	Actinoid (f-block)	7
99	Es	Einsteinium	[252]	Actinoid (f-block)	7
100	Fm	Fermium	[257]	Actinoid (f-block)	7
101	Md	Mendelevium	[258]	Actinoid (f-block)	7
102	No	Nobelium	[259]	Actinoid (f-block)	7
103	Lr	Lawrencium	[266]	Actinoid (f-block)	7
104	Rf	Rutherfordium	[267]	4	7
105	Db	Dubnium	[268]	5	7
106	Sg	Seaborgium	[269]	6	7
107	Bh	Bohrium	[270]	7	7
108	Hs	Hassium	[277]	8	7
109	Mt	Meitnerium	[278]	9	7
110	Ds	Darmstadtium	[281]	10	7
111	Rg	Roentgenium	[282]	11	7
112	Cn	Copernicium	[285]	12	7
113	Nh	Nihonium	[286]	13	7
114	Fl	Flerovium	[289]	14	7
115	Mc	Moscovium	[290]	15	7
116	Lv	Livermorium	[293]	16	7
117	Ts	Tennessine	[294]	17	7
118	Og	Oganesson	[294]	18	7

Frequently asked questions

Is this free?

Yes. Study, compare, take quizzes and download without an account.

Do all isotopes have the same neutron count?

No. Isotopes share a proton count but differ in neutrons. Each reference identifies the isotope used for its neutron count.

Does the temperature model work at any pressure?

It is a simplified model at 1 atm. Sublimation, low-temperature helium and data limits are handled. It is not a full model of pressure changes, plasma or chemical transformations.

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SahajPatra Periodic Table 118/118 3D Lab

Side-by-Side Element Comparison (2–4 Elements)

Chronological Discovery of the 118 Elements

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All 118 chemical elements

How to read the periodic table

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