Group	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
	I	II											III	IV	V	VI	VII	VIII
Period
1	hydrogen 1 H 1.0079																	helium 2 He 4.00260
2	lithium 3 Li 6.94	beryllium 4 Be 9.01218											boron 5 B 10.81	carbon 6 C 12.011	nitrogen 7 N 14.007	oxygen 8 O 15.999	fluorine 9 F 18.998403	neon 10 Ne 20.180
3	sodium 11 Na 22.9897693	magnesium 12 Mg 24.305											aluminium 13 Al 26.981539	silicon 14 Si 28.086	phosphorus 15 P 30.97376	sulfur 16 S 32.06	chlorine 17 Cl 35.45	argon 18 Ar 39.948
4	potassium 19 K 39.0983	calcium 20 Ca 40.08	scandium 21 Sc 44.95591	titanium 22 Ti 47.867	vanadium 23 V 50.9415	chromium 24 Cr 51.996	manganese 25 Mn 54.93804	iron 26 Fe 55.84	cobalt 27 Co 58.93320	nickel 28 Ni 58.693	copper 29 Cu 63.55	zinc 30 Zn 65.41	gallium 31 Ga 69.723	germanium 32 Ge 72.64	arsenic 33 As 74.9216	selenium 34 Se 79.0	bromine 35 Br 79.904	krypton 36 Kr 83.80
5	rubidium 37 Rb 85.468	strontium 38 Sr 87.62	yttrium 39 Y 88.9058	zirconium 40 Zr 91.22	niobium 41 Nb 92.9064	molybdenum 42 Mo 95.9	technetium 43 Tc [97.9072]	ruthenium 44 Ru 101.1	rhodium 45 Rh 102.9055	palladium 46 Pd 106.42	silver 47 Ag 107.868	cadmium 48 Cd 112.41	indium 49 In 114.82	tin 50 Sn 118.71	antimony 51 Sb 121.760	tellurium 52 Te 127.6	iodine 53 I 126.9045	xenon 54 Xe 131.29
6	caesium 55 Cs 132.905452	barium 56 Ba 137.33	57-71 *	hafnium 72 Hf 178.5	tantalum 73 Ta 180.9479	tungsten 74 W 183.84	rhenium 75 Re 186.207	osmium 76 Os 190.2	iridium 77 Ir 192.22	platinum 78 Pt 195.08	gold 79 Au 196.96657	mercury 80 Hg 200.6	thallium 81 Tl 204.383	lead 82 Pb 207.2	bismuth 83 Bi 208.98040	polonium 84 Po [208.9824]	astatine 85 At [209.9871]	radon 86 Rn [222.0176]
7	francium 87 Fr [223]	radium 88 Ra [226]	89-103 **	rutherfordium 104 Rf [261]	dubnium 105 Db [262]	seaborgium 106 Sg [266]	bohrium 107 Bh [264]	hassium 108 Hs [277]	meitnerium 109 Mt [268]	darmstadtium 110 Ds [271]	roentgenium 111 Rg [272]	ununbium 112 Uub [277]	ununtrium 113 Uut [284]	ununquadium 114 Uuq [289]	ununpentium 115 Uup [288]	ununhexium 116 Uuh [292]	ununseptium 117 Uus [291]***	ununoctium 118 Uuo [294]***

* Lanthanides	lanthanum 57 La 138.9055	cerium 58 Ce 140.116	praseodymium 59 Pr 140.9076	neodymium 60 Nd 144.24	promethium 61 Pm [145]	samarium 62 Sm 150.4	europium 63 Eu 151.964	gadolinium 64 Gd 157.2	terbium 65 Tb 158.9254	dysprosium 66 Dy 162.500	holmium 67 Ho 164.9303	erbium 68 Er 167.26	thulium 69 Tm 168.9342	ytterbium 70 Yb 173.0	lutetium 71 Lu 174.967
** Actinides	actinium 89 Ac [227]	thorium 90 Th 232.0381	protactinium 91 Pa 231.0359	uranium 92 U 238.0289	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 [262]