THE PERIODIC TABLE OF THE ELEMENTS
IUPAC:		1	2		3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
traditional:		IA	IIA		IIIB	IVB	VB	VIB	VIIB	VIIIB			IB	IIB	IIIA	IVA	VA	VIA	VIIA	VIIIA
									atomic number		1									2
	1								symbol		H									He
									atomic mass		1.008									4.003
		3	4												5	6	7	8	9	10
	2	Li	Be												B	C	N	O	F	Ne
		6.941	9.012												10.81	12.01	14.01	16.00	19.00	20.18
		11	12												13	14	15	16	17	18
	3	Na	Mg												Al	Si	P	S	Cl	Ar
		22.99	24.30												26.98	28.09	30.97	32.06	35.45	39.95
		19	20		21	22	23	24	25	26	27	28	29	30	31	32	33	34	35	36
	4	K	Ca		Sc	Ti	V	Cr	Mn	Fe	Co	Ni	Cu	Zn	Ga	Ge	As	Se	Br	Kr
		39.10	40.08		44.96	47.87	50.94	52.00	54.94	55.84	58.93	58.69	63.55	65.41	69.72	72.64	74.92	78.96	79.90	83.80
		37	38		39	40	41	42	43	44	45	46	47	48	49	50	51	52	53	54
	5	Rb	Sr		Y	Zr	Nb	Mo	Tc	Ru	Rh	Pd	Ag	Cd	In	Sn	Sb	Te	I	Xe
		85.47	87.62		88.91	91.22	92.91	95.94	[97.91]	101.1	102.9	106.4	107.9	112.4	114.8	118.7	121.8	127.6	126.9	131.3
		55	56		71	72	73	74	75	76	77	78	79	80	81	82	83	84	85	86
	6	Cs	Ba	lanthanides	Lu	Hf	Ta	W	Re	Os	Ir	Pt	Au	Hg	Tl	Pb	Bi	Po	At	Rn
		132.9	137.3	(below)	175.0	178.5	180.9	183.8	186.2	190.2	192.2	195.1	197.0	200.6	204.4	207.2	209.0	[209.0]	[210.0]	[222.0]
		87	88		103	104	105	106	107	108	109	110	111	112	113	114	115	116	117	118
	7	Fr	Ra	actinides	Lr	Rf	Db	Sg	Bh	Hs	Mt	Ds	Rg	Uub	Uut	Uuq	Uup	Uuh	Uus	Uuo
		[223.0]	[226.0]	(below)	[262.1]	[263.1]	[262.1]	[266.1]	[267.1]	[267.1]	[267.1]	[281.1]	[272.2]	[285.2]	[284.2]	[289.2]	[288.2]	[292.2]		[294.2]
		119	120
	8	Uue	Ubn
					57	58	59	60	61	62	63	64	65	66	67	68	69	70
			6	lanthanides	La	Ce	Pr	Nd	Pm	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb
					138.9	140.1	140.9	144.2	[144.9]	150.4	152.0	157.2	158.9	162.5	164.9	167.3	168.9	173.0
					89	90	91	92	93	94	95	96	97	98	99	100	101	102
			7	actinides	Ac	Th	Pa	U	Np	Pu	Am	Cm	Bk	Cf	Es	Fm	Md	No
					[227.0]	232.0	231.0	238.0	[237.0]	[244.1]	[243.1]	[247.1]	[247.1]	[251.1]	[252.1]	[257.1]	[258.1]	[259.1]
	Values for atomic masses in brackets are the atomic masses of the most stable isotopes. Element symbols without an atomic mass have not yet been synthesized.