Periodic table of the elements

This is a simple periodic table of the elements, displayed in simple tabular form. Frankly there are much prettier ones on line. But this is the one we currently have in our database and is really here for completeness. That said, it does have one rather nice little feature, insofar as you can group elements together by clicking the column headers.

Atomic Number	Atomic Mass (u)	Element Name	Element Symbol	Element Group	Comment
1	1.008	Hydrogen	H	1	Lightest element, nonmetal, highly reactive gas
2	4.0026	Helium	He	18	Noble gas, inert, second lightest element
3	6.94	Lithium	Li	1	Alkali metal, soft, silvery-white metal
4	9.0122	Beryllium	Be	2	Alkaline earth metal, relatively rare
5	10.81	Boron	B	13	Metalloid, essential for borosilicate glass
6	12.011	Carbon	C	14	Basis of organic life, found in all known life forms
7	14.007	Nitrogen	N	15	Major component of Earth's atmosphere
8	15.999	Oxygen	O	16	Essential for respiration
9	18.998	Fluorine	F	17	Highly reactive halogen
10	20.18	Neon	Ne	18	Noble gas, used in lighting
11	22.99	Sodium	Na	1	Alkali metal, highly reactive, common in salt
12	24.305	Magnesium	Mg	2	Light metal used in alloys
13	26.982	Aluminum	Al	13	Lightweight, corrosion resistant
14	28.085	Silicon	Si	14	Semiconductor, major component of electronics
15	30.974	Phosphorus	P	15	Essential for DNA and ATP
16	32.06	Sulfur	S	16	Found in proteins and vitamins
17	35.45	Chlorine	Cl	17	Halogen, used in disinfectants
18	39.948	Argon	Ar	18	Noble gas used in lighting
19	39.098	Potassium	K	1	Alkali metal essential for life
20	40.078	Calcium	Ca	2	Important for bones and teeth
21	44.956	Scandium	Sc	3	Rare earth metal used in alloys
22	47.867	Titanium	Ti	4	Strong, corrosion resistant metal
23	50.942	Vanadium	V	5	Used to strengthen steel
24	51.996	Chromium	Cr	6	Shiny metal used in plating
25	54.938	Manganese	Mn	7	Important industrial metal
26	55.845	Iron	Fe	8	Main component of steel
27	58.933	Cobalt	Co	9	Magnetic metal used in batteries
28	58.693	Nickel	Ni	10	Used in stainless steel
29	63.546	Copper	Cu	11	Excellent electrical conductor
30	65.38	Zinc	Zn	12	Used for galvanizing steel
31	69.723	Gallium	Ga	13	Soft metal used in semiconductors and electronics
32	72.63	Germanium	Ge	14	Semiconductor used in transistors
33	74.922	Arsenic	As	15	Metalloid known for its toxicity
34	78.971	Selenium	Se	16	Nonmetal used in photocells and glass coloring
35	79.904	Bromine	Br	17	Red-brown halogen liquid
36	83.798	Krypton	Kr	18	Noble gas used in lighting
37	85.468	Rubidium	Rb	1	Soft, highly reactive alkali metal
38	87.62	Strontium	Sr	2	Alkaline earth metal used in fireworks
39	88.906	Yttrium	Y	3	Transition metal used in LEDs
40	91.224	Zirconium	Zr	4	Corrosion resistant metal used in reactors
41	92.906	Niobium	Nb	5	Transition metal used in steel alloys
42	95.95	Molybdenum	Mo	6	Metal used to strengthen steel
43	98	Technetium	Tc	7	Radioactive element, first synthetic element
44	101.07	Ruthenium	Ru	8	Rare transition metal
45	102.91	Rhodium	Rh	9	Precious metal used in catalytic converters
46	106.42	Palladium	Pd	10	Catalyst metal used in electronics
47	107.87	Silver	Ag	11	Highly conductive precious metal
48	112.41	Cadmium	Cd	12	Toxic metal used in batteries
49	114.82	Indium	In	13	Soft metal used in touchscreens
50	118.71	Tin	Sn	14	Used in coatings and alloys
51	121.76	Antimony	Sb	15	Metalloid used in flame retardants
52	127.6	Tellurium	Te	16	Rare metalloid used in solar cells
53	126.9	Iodine	I	17	Essential halogen for thyroid
54	131.29	Xenon	Xe	18	Noble gas used in lighting and anesthesia
55	132.91	Cesium	Cs	1	Highly reactive alkali metal
56	137.33	Barium	Ba	2	Alkaline earth metal used in X-ray imaging
57	138.91	Lanthanum	La	3	Light rare earth metal
58	140.12	Cerium	Ce		Soft, ductile, and silvery-white metal
59	140.91	Praseodymium	Pr		Soft, silvery metal used in magnets
60	144.24	Neodymium	Nd		Used in powerful magnets
61	145	Promethium	Pm		Rare radioactive lanthanide
62	150.36	Samarium	Sm		Lanthanide, used in magnets
63	151.96	Europium	Eu		Lanthanide, used in phosphors
64	157.25	Gadolinium	Gd		Lanthanide, magnetic metal
65	158.93	Terbium	Tb		Lanthanide used in green phosphors
66	162.5	Dysprosium	Dy		Lanthanide, used in magnets
67	164.93	Holmium	Ho		Lanthanide, rare earth metal
68	167.26	Erbium	Er		Lanthanide, used in lasers
69	168.93	Thulium	Tm		Lanthanide, rare and radioactive
70	173.04	Ytterbium	Yb		Lanthanide, used in lasers and clocks
71	174.97	Lutetium	Lu		Lanthanide, dense rare earth metal
72	178.49	Hafnium	Hf	4	Transition metal used in alloys
73	180.95	Tantalum	Ta	5	Corrosion-resistant transition metal
74	183.84	Tungsten	W	6	Very dense metal with high melting point
75	186.21	Rhenium	Re	7	Rare transition metal used in alloys
76	190.23	Osmium	Os	8	Densest naturally occurring element
77	192.22	Iridium	Ir	9	Very hard, corrosion-resistant metal
78	195.08	Platinum	Pt	10	Precious metal used in catalysts
79	196.97	Gold	Au	11	Highly valuable precious metal
80	200.59	Mercury	Hg	12	Only metal liquid at room temperature
81	204.38	Thallium	Tl	13	Toxic metal used in electronics
82	207.2	Lead	Pb	14	Heavy metal with high density
83	208.98	Bismuth	Bi	15	Heavy metal with low toxicity
84	209	Polonium	Po	16	Highly radioactive metalloid
85	210	Astatine	At	17	Rare radioactive halogen
86	222	Radon	Rn	18	Radioactive noble gas
87	223	Francium	Fr	1	Highly radioactive alkali metal
88	226	Radium	Ra	2	Radioactive alkaline earth metal
89	227	Actinium	Ac	3	Radioactive actinide metal
90	232.04	Thorium	Th		Radioactive actinide metal used as nuclear fuel
91	231.04	Protactinium	Pa		Radioactive actinide metal
92	238.03	Uranium	U		Radioactive actinide used as nuclear fuel
93	237	Neptunium	Np		Radioactive actinide, synthetic
94	244	Plutonium	Pu		Radioactive actinide used in nuclear weapons
95	243	Americium	Am		Synthetic radioactive actinide
96	247	Curium	Cm		Synthetic radioactive actinide
97	247	Berkelium	Bk		Synthetic radioactive actinide
98	251	Californium	Cf		Synthetic radioactive actinide
99	252	Einsteinium	Es		Synthetic radioactive actinide
100	257	Fermium	Fm		Synthetic radioactive actinide
101	258	Mendelevium	Md		Synthetic radioactive actinide
102	259	Nobelium	No		Synthetic radioactive actinide
103	262	Lawrencium	Lr		Synthetic radioactive actinide
104	267	Rutherfordium	Rf		Synthetic transactinide element
105	270	Dubnium	Db		Synthetic transactinide element
106	271	Seaborgium	Sg		Synthetic transactinide element
107	270	Bohrium	Bh		Synthetic transactinide element
108	277	Hassium	Hs		Synthetic transactinide element
109	276	Meitnerium	Mt		Synthetic transactinide element
110	281	Darmstadtium	Ds		Synthetic transactinide element
111	282	Roentgenium	Rg		Synthetic transactinide element
112	285	Copernicium	Cn		Synthetic transactinide element
113	286	Nihonium	Nh		Synthetic transactinide element
114	289	Flerovium	Fl		Synthetic transactinide element
115	290	Moscovium	Mc		Synthetic transactinide element
116	293	Livermorium	Lv		Synthetic transactinide element
117	294	Tennessine	Ts		Synthetic halogen
118	294	Oganesson	Og		Synthetic noble gas - very unstable

Units

Atomic mass is measured in usually measured in unified atomic mass unit (u). AKA atomic mass units (amu). $1 u is defined as 1 / 12 the mass of a carbon-12 atom, and is equal to 1.6605\times10 -27 kg.$ Atomic number has no unit. It is simply a number: the number of protons in an atom.

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