Elements by Period

A period is a horizontal row in the periodic table. All elements in a period have the same number of electron shells. Moving across a period, each successive element has one additional proton and generally decreases in metallic character.

Data available for 118 of 118 elements. Most common: 6 (32 elements).

Visualize Period in the periodic table →

118 elements

Elements by Period
		Symbol
1	Hydrogen	H	1
2	Helium	He	1
3	Lithium	Li	2
4	Beryllium	Be	2
5	Boron	B	2
6	Carbon	C	2
7	Nitrogen	N	2
8	Oxygen	O	2
9	Fluorine	F	2
10	Neon	Ne	2
11	Sodium	Na	3
12	Magnesium	Mg	3
13	Aluminum	Al	3
14	Silicon	Si	3
15	Phosphorus	P	3
16	Sulfur	S	3
17	Chlorine	Cl	3
18	Argon	Ar	3
19	Potassium	K	4
20	Calcium	Ca	4
21	Scandium	Sc	4
22	Titanium	Ti	4
23	Vanadium	V	4
24	Chromium	Cr	4
25	Manganese	Mn	4
26	Iron	Fe	4
27	Cobalt	Co	4
28	Nickel	Ni	4
29	Copper	Cu	4
30	Zinc	Zn	4
31	Gallium	Ga	4
32	Germanium	Ge	4
33	Arsenic	As	4
34	Selenium	Se	4
35	Bromine	Br	4
36	Krypton	Kr	4
37	Rubidium	Rb	5
38	Strontium	Sr	5
39	Yttrium	Y	5
40	Zirconium	Zr	5
41	Niobium	Nb	5
42	Molybdenum	Mo	5
43	Technetium	Tc	5
44	Ruthenium	Ru	5
45	Rhodium	Rh	5
46	Palladium	Pd	5
47	Silver	Ag	5
48	Cadmium	Cd	5
49	Indium	In	5
50	Tin	Sn	5
51	Antimony	Sb	5
52	Tellurium	Te	5
53	Iodine	I	5
54	Xenon	Xe	5
55	Cesium	Cs	6
56	Barium	Ba	6
57	Lanthanum	La	6
58	Cerium	Ce	6
59	Praseodymium	Pr	6
60	Neodymium	Nd	6
61	Promethium	Pm	6
62	Samarium	Sm	6
63	Europium	Eu	6
64	Gadolinium	Gd	6
65	Terbium	Tb	6
66	Dysprosium	Dy	6
67	Holmium	Ho	6
68	Erbium	Er	6
69	Thulium	Tm	6
70	Ytterbium	Yb	6
71	Lutetium	Lu	6
72	Hafnium	Hf	6
73	Tantalum	Ta	6
74	Tungsten	W	6
75	Rhenium	Re	6
76	Osmium	Os	6
77	Iridium	Ir	6
78	Platinum	Pt	6
79	Gold	Au	6
80	Mercury	Hg	6
81	Thallium	Tl	6
82	Lead	Pb	6
83	Bismuth	Bi	6
84	Polonium	Po	6
85	Astatine	At	6
86	Radon	Rn	6
87	Francium	Fr	7
88	Radium	Ra	7
89	Actinium	Ac	7
90	Thorium	Th	7
91	Protactinium	Pa	7
92	Uranium	U	7
93	Neptunium	Np	7
94	Plutonium	Pu	7
95	Americium	Am	7
96	Curium	Cm	7
97	Berkelium	Bk	7
98	Californium	Cf	7
99	Einsteinium	Es	7
100	Fermium	Fm	7
101	Mendelevium	Md	7
102	Nobelium	No	7
103	Lawrencium	Lr	7
104	Rutherfordium	Rf	7
105	Dubnium	Db	7
106	Seaborgium	Sg	7
107	Bohrium	Bh	7
108	Hassium	Hs	7
109	Meitnerium	Mt	7
110	Darmstadtium	Ds	7
111	Roentgenium	Rg	7
112	Copernicium	Cn	7
113	Nihonium	Nh	7
114	Flerovium	Fl	7
115	Moscovium	Mc	7
116	Livermorium	Lv	7
117	Tennessine	Ts	7
118	Oganesson	Og	7

Elements by Period

Related properties