CPH

Periodic table (18-column layout)

Group →	1	2	3		4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
	Alkali metal	Alkaline earth metal												Boron group	Carbon group	Pnictogen	Chalcogen	Halogen	Noble gas
CAS:	IA	IIA	IIIB		IVB	VB	VIB	VIIB	VIIIB			IB	IIB	IIIA	IVA	VA	VIA	VIIA	VIIIA
old IUPAC:	IA	IIA	IIIA		IVA	VA	VIA	VIIA	VIII			IB	IIB	IIIB	IVB	VB	VIB	VIIB	0
Period ↓ 1	Hydrogen 1 H [7000100780000000000♠1.0078, 7000100820000000000♠1.0082] *short:* 7000100800000000000♠1.008	→element name atomic number chemical symbol *standard atomic weight*																	Helium 2 He 4.002602(2) *short:* 7000400260000000000♠4.0026
2	Lithium 3 Li [7000693800000000000♠6.938, 7000699700000000000♠6.997] *short:* 7000694000000000000♠6.94	Beryllium 4 Be 9.0121831(5) *short:* 7000901220000000000♠9.0122												Boron 5 B [7001108059999999999♠10.806, 7001108210000000000♠10.821] *short:* 7001108100000000000♠10.81	Carbon 6 C [7001120090000000000♠12.009, 7001120120000000000♠12.012] *short:* 7001120110000000000♠12.011	Nitrogen 7 N [7001140060000000000♠14.006, 7001140079999999999♠14.008] *short:* 7001140070000000000♠14.007	Oxygen 8 O [7001159990000000000♠15.999, 7001160000000000000♠16.000] *short:* 7001159990000000000♠15.999	Fluorine 9 F 18.998403163(6) *short:* 7001189980000000000♠18.998	Neon 10 Ne 20.1797(6) *short:* 7001201800000000000♠20.180
3	Sodium 11 Na 22.98976928(2) *short:* 7001229899999999999♠22.990	Magnesium 12 Mg [7001243040000000000♠24.304, 7001243070000000000♠24.307] *short:* 7001243050000000000♠24.305												Aluminium 13 Al 26.9815385(7) *short:* 7001269820000000000♠26.982	Silicon 14 Si [7001280840000000000♠28.084, 7001280860000000000♠28.086] *short:* 7001280850000000000♠28.085	Phosphorus 15 P 30.973761998(5) *short:* 7001309740000000000♠30.974	Sulfur 16 S [7001320590000000000♠32.059, 7001320760000000000♠32.076] *short:* 7001320600000000000♠32.06	Chlorine 17 Cl [7001354460000000000♠35.446, 7001354570000000000♠35.457] *short:* 7001354500000000000♠35.45	Argon 18 Ar 39.948(1) *short:* 7001399480000000000♠39.948
4	Potassium 19 K 39.0983(1) *short:* 7001390980000000000♠39.098	Calcium 20 Ca 40.078(4) *short:* 7001400780000000000♠40.078(4)	Scandium 21 Sc 44.955908(5) *short:* 7001449560000000000♠44.956		Titanium 22 Ti 47.867(1) *short:* 7001478670000000000♠47.867	Vanadium 23 V 50.9415(1) *short:* 7001509420000000000♠50.942	Chromium 24 Cr 51.9961(6) *short:* 7001519960000000000♠51.996	Manganese 25 Mn 54.938044(3) *short:* 7001549380000000000♠54.938	Iron 26 Fe 55.845(2) *short:* 7001558450000000000♠55.845(2)	Cobalt 27 Co 58.933194(4) *short:* 7001589330000000000♠58.933	Nickel 28 Ni 58.6934(4) *short:* 7001586930000000000♠58.693	Copper 29 Cu 63.546(3) *short:* 7001635460000000000♠63.546(3)	Zinc 30 Zn 65.38(2) *short:* 7001653800000000000♠65.38(2)	Gallium 31 Ga 69.723(1) *short:* 7001697230000000000♠69.723	Germanium 32 Ge 72.630(8) *short:* 7001726300000000000♠72.630(8)	Arsenic 33 As 74.921595(6) *short:* 7001749220000000000♠74.922	Selenium 34 Se 78.971(8) *short:* 7001789710000000000♠78.971(8)	Bromine 35 Br [7001799010000000000♠79.901, 7001799070000000000♠79.907] *short:* 7001799040000000000♠79.904	Krypton 36 Kr 83.798(2) *short:* 7001837980000000000♠83.798(2)
5	Rubidium 37 Rb 85.4678(3) *short:* 7001854680000000000♠85.468	Strontium 38 Sr 87.62(1) *short:* 7001876200000000000♠87.62	Yttrium 39 Y 88.90584(2) *short:* 7001889060000000000♠88.906		Zirconium 40 Zr 91.224(2) *short:* 7001912240000000000♠91.224(2)	Niobium 41 Nb 92.90637(2) *short:* 7001929060000000000♠92.906	Molybdenum 42 Mo 95.95(1) *short:* 7001959500000000000♠95.95	Technetium 43 Tc [98]	Ruthenium 44 Ru 101.07(2) *short:* 7002101070000000000♠101.07(2)	Rhodium 45 Rh 102.90550(2) *short:* 7002102910000000000♠102.91	Palladium 46 Pd 106.42(1) *short:* 7002106420000000000♠106.42	Silver 47 Ag 107.8682(2) *short:* 7002107870000000000♠107.87	Cadmium 48 Cd 112.414(4) *short:* 7002112410000000000♠112.41	Indium 49 In 114.818(1) *short:* 7002114820000000000♠114.82	Tin 50 Sn 118.710(7) *short:* 7002118710000000000♠118.71	Antimony 51 Sb 121.760(1) *short:* 7002121760000000000♠121.76	Tellurium 52 Te 127.60(3) *short:* 7002127600000000000♠127.60(3)	Iodine 53 I 126.90447(3) *short:* 7002126900000000000♠126.90	Xenon 54 Xe 131.293(6) *short:* 7002131289999999999♠131.29
6	Caesium 55 Cs 132.90545196(6) *short:* 7002132910000000000♠132.91	Barium 56 Ba 137.327(7) *short:* 7002137330000000000♠137.33	Lanthanum 57 La 138.90547(7) *short:* 7002138910000000000♠138.91	58–71	Hafnium 72 Hf 178.49(2) *short:* 7002178490000000000♠178.49(2)	Tantalum 73 Ta 180.94788(2) *short:* 7002180950000000000♠180.95	Tungsten 74 W 183.84(1) *short:* 7002183840000000000♠183.84	Rhenium 75 Re 186.207(1) *short:* 7002186210000000000♠186.21	Osmium 76 Os 190.23(3) *short:* 7002190230000000000♠190.23(3)	Iridium 77 Ir 192.217(3) *short:* 7002192220000000000♠192.22	Platinum 78 Pt 195.084(9) *short:* 7002195080000000000♠195.08	Gold 79 Au 196.966569(5) *short:* 7002196970000000000♠196.97	Mercury 80 Hg 200.592(3) *short:* 7002200590000000000♠200.59	Thallium 81 Tl [7002204380000000000♠204.38, 7002204390000000000♠204.39] *short:* 7002204380000000000♠204.38	Lead 82 Pb 207.2(1) *short:* 7002207200000000000♠207.2	Bismuth 83 Bi 208.98040(1) *short:* 7002208980000000000♠208.98	Polonium 84 Po [209]	Astatine 85 At [210]	Radon 86 Rn [222]
7	Francium 87 Fr [223]	Radium 88 Ra [226]	Actinium 89 Ac [227]	90–103	Rutherfordium 104 Rf [267]	Dubnium 105 Db [268]	Seaborgium 106 Sg [269]	Bohrium 107 Bh [270]	Hassium 108 Hs [270]	Meitnerium 109 Mt [278]	Darmstadtium 110 Ds [281]	Roentgenium 111 Rg [282]	Copernicium 112 Cn [285]	Nihonium 113 Nh [286]	Flerovium 114 Fl [289]	Moscovium 115 Mc [290]	Livermorium 116 Lv [293]	Tennessine 117 Ts [294]	Oganesson 118 Og [294]

					Cerium 58 Ce 140.116(1) *short:* 7002140120000000000♠140.12	Praseodymium 59 Pr 140.90766(2) *short:* 7002140910000000000♠140.91	Neodymium 60 Nd 144.242(3) *short:* 7002144240000000000♠144.24	Promethium 61 Pm [145]	Samarium 62 Sm 150.36(2) *short:* 7002150360000000000♠150.36(2)	Europium 63 Eu 151.964(1) *short:* 7002151960000000000♠151.96	Gadolinium 64 Gd 157.25(3) *short:* 7002157250000000000♠157.25(3)	Terbium 65 Tb 158.92535(2) *short:* 7002158930000000000♠158.93	Dysprosium 66 Dy 162.500(1) *short:* 7002162500000000000♠162.50	Holmium 67 Ho 164.93033(2) *short:* 7002164930000000000♠164.93	Erbium 68 Er 167.259(3) *short:* 7002167260000000000♠167.26	Thulium 69 Tm 168.93422(2) *short:* 7002168930000000000♠168.93	Ytterbium 70 Yb 173.045(10) *short:* 7002173050000000000♠173.05	Lutetium 71 Lu 174.9668(1) *short:* 7002174970000000000♠174.97
					Thorium 90 Th 232.0377(4) *short:* 7002232040000000000♠232.04	Protactinium 91 Pa 231.03588(2) *short:* 7002231040000000000♠231.04	Uranium 92 U 238.02891(3) *short:* 7002238030000000000♠238.03	Neptunium 93 Np [237]	Plutonium 94 Pu [244]	Americium 95 Am [243]	Curium 96 Cm [247]	Berkelium 97 Bk [247]	Californium 98 Cf [251]	Einsteinium 99 Es [252]	Fermium 100 Fm [257]	Mendelevium 101 Md [258]	Nobelium 102 No [259]	Lawrencium 103 Lr [266]

Legend

1 (red)=Gas 3 (black)=Solid 80 (green)=Liquid 109 (gray)=Unknown Color of the atomic number shows state of matter (at 0 °C and 1 atm)

Primordial From decay Synthetic Border shows natural occurrence of the element

kground color shows subcategory in the metal–metalloid–nonmetal trend:

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

** Actinides

89
Ac

90
Th

91
Pa

92
U

93
Np

94
Pu

95
Am

96
Cm

97
Bk

98
Cf

99
Es

100
Fm

101
Md

102
No

103
Lr

Element Categories in the Periodic Table

Metals						Metalloids	Nonmetals
Alkali metals	Alkaline earth metals	Inner transition elements		Transition elements	Other metals		Other nonmetals	Halogens	Noble gases
		Lanthanides	Actinides

**Atomic number colors show state at standard temperature and pressure (0 °C and 1 atm)**
Solids	Liquids	Gases

**Borders show natural occurrence**
Primordial	From decay	Synthetic	Undiscovered

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