Name	Symbol	Atomic No.	Atomic Weight	Melting Point ºC	Boiling Point ºC	Year Discovered
Actinium	Ac	89	(227)	1,050	3,200 ?300	1899
Aluminum	Al	13	26.98154	660.37	2,467	1827
Americium	Am	95	(243)	994 ?4	2,607	1944
Antimony	Sb	51	121.75	630.74	1,950	B.C.
Argon	Ar	18	39.948	-189.2	-185.7	1894
Arsenic	As	33	74.9216	817*	613	1250
Astatine	At	85	(210)	302(e)	337	1940
Barium	Ba	56	137.33	725	1,640	1808
Berkelium	Bk	97	(247)	?/td>	?/td>	1949
Beryllium	Be	4	9.01218	1,278 ?5	2,970	1798
Bismuth	Bi	83	208.9804	271.3	1,560 ?5	1450
Boron	B	5	10.81	2,079	2,550	1808
Bromine	Br	35	79.904	-7.2	58.78	1826
Cadmium	Cd	48	112.41	320.9	765	1817
Calcium	Ca	20	40.08	839 ?2	1,484	1808
Californium	Cf	98	(252)	?/td>	?/td>	1950
Carbon	C	6	12.011	~3,550	4,827	B.C.
Cerium	Ce	58	140.12	799	3,426	1803
Cesium	Cs	55	132.9054	28.40	669.3	1860
Chlorine	Cl	17	35.453	-100.98	-34.6	1774
Chromium	Cr	24	51.996	1,857 ?20	2,672	1797
Cobalt	Co	27	58.9332	1,495	2,870	1735
Columbium (also known as Niobium ?Nb)	Cb	41	92.9064	2,468 ?10	4,742	1801
Copper	Cu	29	63.546	1,083.4 ?0.2	2,567	c. 8000 B.C.
Curium	Cm	96	(247)	1,340 ?40	?/td>	1944
Dysprosium	Dy	66	162.50	1,412	2,562	1886
Einsteinium	E	99	(252)	?/td>	?/td>	1954
Erbium	Er	68	167.26	1,522	2,863	1843
Europium	Eu	63	151.96	822	1,597	1901
Fermium	Fm	100	(257)	?/td>	?/td>	1952
Fluorine	F	9	18.998403	-219.62	-188.14	1771
Francium	Fr	87	(223)	(27)(e)	(677)(e)	1939
Gadolinium	Gd	64	157.25	1,313 ?1	3,266	1886
Gallium	Ga	31	69.72	29.78	2,403	1875
Germanium	Ge	32	72.59	937.4	2,830	1886
Gold	Au	79	196.9665	1,064.43	3,080	c. 3000 B.C.
Hafnium	Hf	72	178.49	2,227 ?20	4,602	1923
Helium	He	2	4.00260	<-272.2	-268.934	1868
Holmium	Ho	67	164.9304	1,474	2,695	1878
Hydrogen	H	1	1.00794	-259.14	-252.87	1766
Indium	In	49	114.82	156.61	2,080	1863
Iodine	I	53	126.9045	113.5	184.35	1811
Iridium	Ir	77	192.2	2,410	4,130	1804
Iron	Fe	26	55.847	1,535	2,750	c. 2500 B.C.
Krypton	Kr	36	83.80	-156.6	-152.30 ?0.10	1898
Lanthanum	La	57	138.9055	921	3,457	1839
Lawrencium	Lr	103	(260)	?/td>	?/td>	1961
Lead	Pb	82	207.2	327.502	1,740	c. 1000 B.C.
Lithium	Li	3	6.94	180.54	1,342	1817
Lutetium	Lu	71	174.967	1663	3,395	1907
Magnesium	Mg	12	24.305	648.8 ?0.5	1,090	1808
Manganese	Mn	25	54.9380	1,244 ?3	1,962	1774
Mendelevium	Md	101	(258)	?/td>	?/td>	1955
Mercury	Hg	80	200.59	-38.842	356.58	c. 1500 B.C.
Molybdenum	Mo	42	95.94	2,617	4,612	1782
Neodymium	Nd	60	144.24	1,021	3,068	1885
Neon	Ne	10	20.179	-248.67	-246.048	1898
Neptunium	Np	93	237.0482	640 ?1	3,902(e)	1940
Nickel	Ni	28	58.69	1,453	2,732	1751
Nitrogen	N	7	14.0067	-209.86	-195.8	1772
Nobelium	No	102	(259)	?/td>	?/td>	1958
Osmium	Os	76	190.2	3,045 ?30	5,027 ?100	1804
Oxygen	O	8	15.9994	-218.4	-182.962	1774
Palladium	Pd	46	106.4	1,554	2,970	1803
Phosphorus	P	15	30.97376	44.1(w)	280(w)	1669
Platinum	Pt	78	195.08	1,772	3,827 ?100	1735
Plutonium	Pu	94	(244)	641	3,232	1940
Polonium	Po	84	(209)	254	962	1898
Potassium	K	19	39.0983	63.25	760	1807
Praseodymium	Pr	59	140.9077	931	3,512	1885
Promethium	Pm	61	(145)	~1168 ?6	2,460	1948
Protactinium	Pa	91	231.0359	1,600	?/td>	1917
Radium	Ra	88	226.0254	700	1,140	1898
Radon	Rn	86	(222)	-71	-61.8	1900
Rhenium	Re	75	186.207	3,180	5,627(e)	1925
Rhodium	Rh	45	102.9055	1,966 ?3	3,727 ?100	1803
Rubidium	Rb	37	85.4678	38.89	686	1861
Ruthenium	Ru	44	101.07	2,310	3,900	1845
Samarium	Sm	62	150.36	1,072 ?5	1,791	1879
Scandium	Sc	21	44.9559	1,541	2,831	1879
Selenium	Se	34	78.96	217	684.9 ?1	1817
Silicon	Si	14	28.0855	1,410	2,355	1823
Silver	Ag	47	107.8682	961.93	2,212	c. 3000 B.C.
Sodium	Na	11	22.98977	97.81 ?0.03	882.9	1807
Strontium	Sr	38	87.62	769	1,384	1790
Sulfur	S	16	32.06	112.8	444.674	B.C.
Tantalum	Ta	73	180.9479	2,996	5,425 ?100	1802
Technetium	Tc	43	(98)	2,172	4,877	1937
Tellurium	Te	52	127.60	449.5 ?0.3	989.8 ?3.8	1782
Terbium	Tb	65	158.9254	1,356	3,123	1843
Thallium	Tl	81	204.383	303.5	1,457 ?10	1861
Thorium	Th	90	232.0381	1,750	~4,790	1828
Thulium	Tm	69	168.9342	1,545 ?15	1,947	1879
Tin	Sn	50	118.69	231.9681	2,270	c. 3500 B.C.
Titanium	Ti	22	47.88	1,660 ?10	3,287	1791
Tungsten	W	74	183.85	3,410 ?20	5,660	1783
Unnilennium	Une	109	(266)	?/td>	?/td>	1982
Unnilhexium	Unh	106	(263)	?/td>	?/td>	1974
Unnilpentium	Unp?/td>	105	(262)	?/td>	?/td>	1970
Unnilquadium	Unq?/td>	104	(261)	?/td>	?/td>	1969
Unnilseptium	Uns	107	(262)	?/td>	?/td>	1976
Uranium	U	92	238.0289	1,132.3 ?0.8	3,818	1789
Vanadium	V	23	50.9415	1,890 ?10	3,380	1801
Xenon	Xe	54	131.29	-111.9	-107.1 ?3	1898
Ytterbium	Yb	70	173.04	819	1,194	1878
Yttrium	Y	39	88.9059	1,522 ?8	3,338	1794
Zinc	Zn	30	65.38	419.58	907	1374
Zirconium	Zr	40	91.22	1,852 ?2	4,377	1789

Note: Parenthesis indicate most stable isotope.
?Other proposed names: Nielsbohrium (Russia), Hahnium (United States).
?Other proposed names: Kurchatovium (Russia), Rutherfordium (United States).
* 28 atmospheres.
^(e) Estimated.
^(w) White.
Source: 1997 Metal Statistics; General Chemistry, Principles and Structure ?1982, published by John Wiley & Sons; The Concise Columbia Encyclopedia, second edition.