Chemical Elements

Science & Nature 118 records Complete free download

Chemical elements with atomic numbers, symbols, weights, families, periodic table positions, discovery years, and credited discoverers.

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The records

The 10 most recently added of 118 records · Select a column heading to sort.

ID	Element	Symbol	Weight	Discovered	Discovered by	Discovery notes	Weight type	Atomic number	Period	Group number	Block	Category
118	Oganesson	Og	294.0000	2006	Joint Institute for Nuclear Research (Dubna); Lawrence Livermore National Laboratory	Year the synthesis was publicly announced, as recorded by Jefferson Lab and the RSC; IUPAC confirmed discovery in 2015.	Isotope mass number	118	7	18	p	Noble gas
117	Tennessine	Ts	294.0000	2010	Joint Institute for Nuclear Research (Dubna); Lawrence Livermore National Laboratory; Oak Ridge National Laboratory		Isotope mass number	117	7	17	p	Halogen
116	Livermorium	Lv	293.0000	2000	Joint Institute for Nuclear Research (Dubna); Lawrence Livermore National Laboratory		Isotope mass number	116	7	16	p	Post-transition metal
115	Moscovium	Mc	290.0000	2003	Joint Institute for Nuclear Research (Dubna); Lawrence Livermore National Laboratory; Oak Ridge National Laboratory	Year of the initial synthesis experiments, as described by Jefferson Lab; discovery was confirmed by IUPAC in 2015.	Isotope mass number	115	7	15	p	Post-transition metal
114	Flerovium	Fl	289.0000	1999	Joint Institute for Nuclear Research (Dubna); Lawrence Livermore National Laboratory	Discovery year follows the RSC summary; its history also records an earlier synthesis experiment in 1998.	Isotope mass number	114	7	14	p	Post-transition metal
113	Nihonium	Nh	286.0000	2004	RIKEN (Japan)		Isotope mass number	113	7	13	p	Post-transition metal
112	Copernicium	Cn	285.0000	1996	Sigurd Hofmann and colleagues		Isotope mass number	112	7	12	d	Transition metal
111	Roentgenium	Rg	282.0000	1994	Peter Armbruster and Gottfried Münzenberg		Isotope mass number	111	7	11	d	Transition metal
110	Darmstadtium	Ds	281.0000	1994	Sigurd Hofmann, Peter Armbruster and Gottfried Münzenberg		Isotope mass number	110	7	10	d	Transition metal
109	Zirconium	Zr	91.2220	1789	Martin Heinrich Klaproth		Standard atomic weight	40	5	4	d	Transition metal

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Last checked against sources: October 14, 2026.

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