Dates	Metal	Atomic No.	Symbol	Atomic Mass	Unit
-	Tin	50	Sn	118.69	g.mol-1
-	Lead	82	Pb	207.2	g.mol-1
-	Bismuth	83	Bi	208.9804	g.mol-1
-	Iron	26	Fe	55.85	g.mol-1
-	Copper	29	Cu	63.546	g.mol-1
-	Zinc	30	Zn	65.37	g.mol-1
-	Silver	47	Ag	107.87	g.mol-1
-	Gold	79	Au	196.9655	g.mol-1
-	Mercury	80	Hg	200.59	g.mol-1

Dates	Metal	Atomic No.	Symbol	Atom Mass	Unit
1735	Cobalt	27	Co	58.9332	g.mol-1
1735-41	Platinum	78	Pt	195.09	g.mol-1
1751	Nickel	28	Ni	58.71	g.mol-1
1774	Manganese	25	Mn	54.9380	g.mol-1
1781	Milybdenum	42	Mo	95.94	g.mol-1
1782	Tellurium	52	Te	127.6	g.mol-1
1783	Tungsten	74	W	183.85	g.mol-1
1789	Uranium	92	U	238.03	g.mol-1
1789	Zirconium	40	Zr	91.22	g.mol-1
1791	Titanium	22	Ti	47.90	g.mol-1
1794	Yttrium	39	Y	88.9059	g.mol-1
1797	Berylium	4	Be	9.01218	g.mol-1
1797	Chromium	24	Cr	51.996	g.mol-1

Dates	Metal	Atomic No.	Symbol	Atomic Mass	Unit
1801	Niobium	41	Nb	92.91	g.mol-1
1802	Tantalum	73	Ta	180.95	g.mol-1
1803	Iridium	77	Ir	192.2	g.mol-1
	Palladium	46	Pd	106.42	g.mol-1
	Rhodium	45	Rh	102.91	g.mol-1
	Osmium	76	Os	190.2	g.mol-1
1807	Potassium	19	K	39.0983	g.mol-1
	Sodium	11	Na	22.98977	g.mol-1
1808	Boron	5	B	10.81	g.mol-1
	Barium	56	Ba	137.33	g.mol-1
	Calcium	20	Ca	40.08	g.mol-1
	Magnesium	12	Mg	24.305	g.mol-1
	Strontium	38	Sr	87.62	g.mol-1
1814	Cerium	58	Ce	140.12	g.mol-1
1817	Lithium	3	Li	6.941	g.mol-1
	Cadmium	48	Cd	112.4	g.mol-1
	Selenium	34	Se	78.96	g.mol-1
1824	Silicon	14	Si	28.0855	g.mol-1
1827	Aluminium	13	Al	26.98154	g.mol-1
1828	Thorium	90	Th	232.04	g.mol-1
1830	Vanadium	23	V	50.9414	g.mol-1
1839	Lanthanum	57	La	138.91	g.mol-1
	(Lanthanide-La-Lu)
1842-43	Erbium	68	Er	167.26	g.mol-1
	Terbium	65	Tb	158.92534	g.mol-1
1844	Ruthenium	44	RU	101.1	g.mol-1
1845	Promethium	61	Pm	(147)	g.mol-1
1860	Caesium	55	Cs	132.9054	g.mol-1
	Rubidium	37	Rb	101.1	g.mol-1
1861	Thallium	81	TI	204.383	g.mol-1
1863	Indium	49	In	114.82	g.mol-1
1875	Gallium	31	Ga	69.72	g.mol-1
1878-85	Ytterbium	70	Yb	173.04	g.mol-1
	Holmium	67	Ho	164.9	g.mol-1
	Scandium	21	Sc	44.9559	g.mol-1
	Samarium	62	Sm	150.35	g.mol-1
	Gadalinium	64	Gd	157.25	g.mol-1
	Neodynium	60	Nd	144.2	g.mol-1
1879	Thulium	69	Tm	168.93	g.mol-1
1885	Praseodynium	59	Pr	140.91	g.mol-1
1886	Germanium	32	Ge	72.59	g.mol-1
	Dysprosium	66	Dy	162.50	g.mol-1
1998	Polonium	84	Po	(210)	g.mol-1
	Radium	88	Ra	226.0254	g.mol-1
1899	Actinium	89-103	Ac	227	g.mol-1
	(Actinide-Acr)

Dates	Metal	Atomic No.	Symbol	Atomic Mass	Unit
1901	Europium	63	Eu	167.26	g.mol-1
1907	Lutetium	71	Lu	174.97	g.mol-1
	(La-Lu Lanthanide)
1913-17	Protactinium	91	Pa	231.0359	g.mol-1
1923	Hafnium	72	Hf	178.49	g.mol-1
1924-25	Rhenium	75	Re	186.23	g.mol-1
1937	Technetium	43	Te	(99)	g.mol-1
1939	Francium	87	Fr	(233)	g.mol-1
1940-61	Transuranium elements
1940	Neptunium	93	Np	(237)	g.mol-1
	Plutonium	94	Pu	(244)	g.mol-1
1944	Curium	96	Cm	(247)	g.mol-1
1945	Promethium	61	Pm	(147)	g.mol-1
	Americium	95	Am	(243)	g.mol-1
1949	Berkelium	97	Bk	(247)	g.mol-1
1950	Californium	98	Cf	(251)	g.mol-1
1952	Einsteinium	99	Es	254	g.mol-1
1953	Fermium	100	Fm	28.0855	g.mol-1
1955	Mendelevium	101	Md	(258)	g.mol-1
1957-58	Nobelium	102	No	259	g.mol-1
1961	Lawrencium	103	Lr	(262)	g.mol-1
1964-69	Rutherfordium	104	Rf	260.9	g.mol-1
1967-70	Dubnium	105	Db	261.9	g.mol-1
1974	Seaborgium	106	Sg	262.94	g.mol-1
1975-76	Bohrium	107	Bh	262	g.mol-1
1982	Meitnerium	109	Mt	265.9	g.mol-1
1984	Hassium	108	Hs	264.9	g.mol-1
1994	Darmstadtium	110	Ds	261.9	g.mol-1
	Roentgenium	111	Rg	271.8	g.mol-1	(eka Ununumium)
1996	Copericium	112	Cn - Uub	276.8	g.mol-1	eka Ununbium)
2000	Ununhexium	116	Uuh	-	g.mol-1	(eka Polonium)
2004	Ununtrium	113	Uut	-	g.mol-1
	Ununquadium	114	Uuq	(289)	g.mol-1
	Ununpentium	115	Uup	-	g.mol-1	(eka Bismuth)
	Ununseptium	117	Uus	-	g.mol-1	(eka Astatine - Not yet synthesized)
2006	Ununoctium	118	Uuo	-	g.mol-1	(eka Radon)

Dates	Metal	Atomic No.	Symbol	Atom Mass	Unit
1735	Cobalt	27	Co	58.9332	g.mol-1
1735-41	Platinum	78	Pt	195.09	g.mol-1
1751	Nickel	28	Ni	58.71	g.mol-1
1774	Manganese	25	Mn	54.9380	g.mol-1
1781	Milybdenum	42	Mo	95.94	g.mol-1
1782	Tellurium	52	Te	127.6	g.mol-1
1783	Tungsten	74	W	183.85	g.mol-1
1789	Uranium	92	U	238.03	g.mol-1
1789	Zirconium	40	Zr	91.22	g.mol-1
1791	Titanium	22	Ti	47.90	g.mol-1
1794	Yttrium	39	Y	88.9059	g.mol-1
1797	Berylium	4	Be	9.01218	g.mol-1
1797	Chromium	24	Cr	51.996	g.mol-1

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