How many elements are in the periodic table?

There are 118 confirmed elements, from hydrogen (atomic number 1) to oganesson (118). The first 94 occur naturally; the rest are synthetic.

What are periods and groups?

A period is a horizontal row (there are 7) and a group is a vertical column (there are 18). Elements in the same group have similar chemical properties.

Is this periodic table free to use?

Yes — it is completely free, needs no sign-up, and works offline in your browser once loaded.

Interactive Periodic Table of Elements (118) — Free

🔍 How to read it

Periods, groups and blocks

The periodic table arranges every element by increasing atomic number. Each row is a period (1–7) and each column is a group (1–18). Elements in the same group share similar chemical behaviour because they have the same number of outer-shell electrons. The table is also split into s-, p-, d- and f-blocks, with the f-block lanthanides and actinides shown in the two rows below. Elements are colour-coded by category — from reactive alkali metals on the left to the noble gases on the right.

🎨 Element categories

Ten families of elements

✓ Alkali metal
✓ Alkaline earth metal
✓ Transition metal
✓ Post-transition metal
✓ Metalloid
✓ Reactive nonmetal
✓ Noble gas
✓ Lanthanide
✓ Actinide
✓ Unknown properties

📋 All 118 elements

Element list with atomic mass

Every element with its symbol, atomic number, standard atomic mass and category. Open the interactive periodic table to tap through them.

#	Symbol	Element	Atomic mass	Category
1	H	Hydrogen	1.008	Reactive nonmetal
2	He	Helium	4.0026	Noble gas
3	Li	Lithium	6.94	Alkali metal
4	Be	Beryllium	9.0122	Alkaline earth metal
5	B	Boron	10.81	Metalloid
6	C	Carbon	12.011	Reactive nonmetal
7	N	Nitrogen	14.007	Reactive nonmetal
8	O	Oxygen	15.999	Reactive nonmetal
9	F	Fluorine	18.998	Reactive nonmetal
10	Ne	Neon	20.18	Noble gas
11	Na	Sodium	22.99	Alkali metal
12	Mg	Magnesium	24.305	Alkaline earth metal
13	Al	Aluminium	26.982	Post-transition metal
14	Si	Silicon	28.085	Metalloid
15	P	Phosphorus	30.974	Reactive nonmetal
16	S	Sulfur	32.06	Reactive nonmetal
17	Cl	Chlorine	35.45	Reactive nonmetal
18	Ar	Argon	39.95	Noble gas
19	K	Potassium	39.098	Alkali metal
20	Ca	Calcium	40.078	Alkaline earth metal
21	Sc	Scandium	44.956	Transition metal
22	Ti	Titanium	47.867	Transition metal
23	V	Vanadium	50.942	Transition metal
24	Cr	Chromium	51.996	Transition metal
25	Mn	Manganese	54.938	Transition metal
26	Fe	Iron	55.845	Transition metal
27	Co	Cobalt	58.933	Transition metal
28	Ni	Nickel	58.693	Transition metal
29	Cu	Copper	63.546	Transition metal
30	Zn	Zinc	65.38	Transition metal
31	Ga	Gallium	69.723	Post-transition metal
32	Ge	Germanium	72.63	Metalloid
33	As	Arsenic	74.922	Metalloid
34	Se	Selenium	78.971	Reactive nonmetal
35	Br	Bromine	79.904	Reactive nonmetal
36	Kr	Krypton	83.798	Noble gas
37	Rb	Rubidium	85.468	Alkali metal
38	Sr	Strontium	87.62	Alkaline earth metal
39	Y	Yttrium	88.906	Transition metal
40	Zr	Zirconium	91.224	Transition metal
41	Nb	Niobium	92.906	Transition metal
42	Mo	Molybdenum	95.95	Transition metal
43	Tc	Technetium	98	Transition metal
44	Ru	Ruthenium	101.07	Transition metal
45	Rh	Rhodium	102.91	Transition metal
46	Pd	Palladium	106.42	Transition metal
47	Ag	Silver	107.87	Transition metal
48	Cd	Cadmium	112.41	Transition metal
49	In	Indium	114.82	Post-transition metal
50	Sn	Tin	118.71	Post-transition metal
51	Sb	Antimony	121.76	Metalloid
52	Te	Tellurium	127.6	Metalloid
53	I	Iodine	126.9	Reactive nonmetal
54	Xe	Xenon	131.29	Noble gas
55	Cs	Caesium	132.91	Alkali metal
56	Ba	Barium	137.33	Alkaline earth metal
57	La	Lanthanum	138.91	Lanthanide
58	Ce	Cerium	140.12	Lanthanide
59	Pr	Praseodymium	140.91	Lanthanide
60	Nd	Neodymium	144.24	Lanthanide
61	Pm	Promethium	145	Lanthanide
62	Sm	Samarium	150.36	Lanthanide
63	Eu	Europium	151.96	Lanthanide
64	Gd	Gadolinium	157.25	Lanthanide
65	Tb	Terbium	158.93	Lanthanide
66	Dy	Dysprosium	162.5	Lanthanide
67	Ho	Holmium	164.93	Lanthanide
68	Er	Erbium	167.26	Lanthanide
69	Tm	Thulium	168.93	Lanthanide
70	Yb	Ytterbium	173.05	Lanthanide
71	Lu	Lutetium	174.97	Lanthanide
72	Hf	Hafnium	178.49	Transition metal
73	Ta	Tantalum	180.95	Transition metal
74	W	Tungsten	183.84	Transition metal
75	Re	Rhenium	186.21	Transition metal
76	Os	Osmium	190.23	Transition metal
77	Ir	Iridium	192.22	Transition metal
78	Pt	Platinum	195.08	Transition metal
79	Au	Gold	196.97	Transition metal
80	Hg	Mercury	200.59	Transition metal
81	Tl	Thallium	204.38	Post-transition metal
82	Pb	Lead	207.2	Post-transition metal
83	Bi	Bismuth	208.98	Post-transition metal
84	Po	Polonium	209	Post-transition metal
85	At	Astatine	210	Metalloid
86	Rn	Radon	222	Noble gas
87	Fr	Francium	223	Alkali metal
88	Ra	Radium	226	Alkaline earth metal
89	Ac	Actinium	227	Actinide
90	Th	Thorium	232.04	Actinide
91	Pa	Protactinium	231.04	Actinide
92	U	Uranium	238.03	Actinide
93	Np	Neptunium	237	Actinide
94	Pu	Plutonium	244	Actinide
95	Am	Americium	243	Actinide
96	Cm	Curium	247	Actinide
97	Bk	Berkelium	247	Actinide
98	Cf	Californium	251	Actinide
99	Es	Einsteinium	252	Actinide
100	Fm	Fermium	257	Actinide
101	Md	Mendelevium	258	Actinide
102	No	Nobelium	259	Actinide
103	Lr	Lawrencium	266	Actinide
104	Rf	Rutherfordium	267	Transition metal
105	Db	Dubnium	268	Transition metal
106	Sg	Seaborgium	269	Transition metal
107	Bh	Bohrium	270	Transition metal
108	Hs	Hassium	269	Transition metal
109	Mt	Meitnerium	278	Unknown properties
110	Ds	Darmstadtium	281	Unknown properties
111	Rg	Roentgenium	282	Unknown properties
112	Cn	Copernicium	285	Unknown properties
113	Nh	Nihonium	286	Unknown properties
114	Fl	Flerovium	289	Unknown properties
115	Mc	Moscovium	290	Unknown properties
116	Lv	Livermorium	293	Unknown properties
117	Ts	Tennessine	294	Unknown properties
118	Og	Oganesson	294	Noble gas

🔗 Related

Interactive periodic table of elements

Periods, groups and blocks

Ten families of elements

Element list with atomic mass

More study tools

Stuck on a chemistry chapter?
Have it explained step by step.

Interactive periodic table of elements

Periods, groups and blocks

Ten families of elements

Element list with atomic mass

More study tools

Stuck on a chemistry chapter?Have it explained step by step.

Stuck on a chemistry chapter?
Have it explained step by step.