Period 7 of the Periodic Table

Period 7 of the periodic table has 32 elements, from Francium (Fr) to Oganesson (Og). The period number usually equals the number of electron shells of the atom, and in this period the 7s, 5f, 6d and 7p subshells are filled. Moving left to right across a period, the atomic number increases and the atomic radius usually decreases.

Element list

Atomic no.	Symbol	Name	Atomic mass	Phase	Short configuration
87	Fr	Francium	223	Solid	[Rn] 7s¹
88	Ra	Radium	226	Solid	[Rn] 7s²
89	Ac	Actinium	227	Solid	[Rn] 6d¹ 7s²
90	Th	Thorium	232.04	Solid	[Rn] 6d² 7s²
91	Pa	Protactinium	231.04	Solid	[Rn] 5f² 6d¹ 7s²
92	U	Uranium	238.03	Solid	[Rn] 5f³ 6d¹ 7s²
93	Np	Neptunium	237	Solid	[Rn] 5f⁴ 6d¹ 7s²
94	Pu	Plutonium	244	Solid	[Rn] 5f⁶ 7s²
95	Am	Americium	243	Solid	[Rn] 5f⁷ 7s²
96	Cm	Curium	247	Solid	[Rn] 5f⁷ 6d¹ 7s²
97	Bk	Berkelium	247	Solid	[Rn] 5f⁹ 7s²
98	Cf	Californium	251	Solid	[Rn] 5f¹⁰ 7s²
99	Es	Einsteinium	252	Solid	[Rn] 5f¹¹ 7s²
100	Fm	Fermium	257	Solid	[Rn] 5f¹² 7s²
101	Md	Mendelevium	258	Solid	[Rn] 5f¹³ 7s²
102	No	Nobelium	259	Solid	[Rn] 5f¹⁴ 7s²
103	Lr	Lawrencium	262	Solid	[Rn] 5f¹⁴ 7s² 7p¹
104	Rf	Rutherfordium	267	Solid (a theoretical prediction)	[Rn] 5f¹⁴ 6d² 7s²
105	Db	Dubnium	268	Solid (a theoretical prediction)	[Rn] 5f¹⁴ 6d³ 7s²
106	Sg	Seaborgium	269	Solid (a theoretical prediction)	[Rn] 5f¹⁴ 6d⁴ 7s²
107	Bh	Bohrium	270	Solid (a theoretical prediction)	[Rn] 5f¹⁴ 6d⁵ 7s²
108	Hs	Hassium	269	Solid (a theoretical prediction)	[Rn] 5f¹⁴ 6d⁶ 7s²
109	Mt	Meitnerium	278	Solid (a theoretical prediction)	[Rn] 5f¹⁴ 6d⁷ 7s²
110	Ds	Darmstadtium	281	Solid (a theoretical prediction)	[Rn] 5f¹⁴ 6d⁹ 7s¹
111	Rg	Roentgenium	282	Solid (a theoretical prediction)	[Rn] 5f¹⁴ 6d¹⁰ 7s¹
112	Cn	Copernicium	285	Liquid (a theoretical prediction)	[Rn] 5f¹⁴ 6d¹⁰ 7s²
113	Nh	Nihonium	286	Solid (a theoretical prediction)	[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p¹
114	Fl	Flerovium	289	Solid (a theoretical prediction)	[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p²
115	Mc	Moscovium	290	Solid (a theoretical prediction)	[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p³
116	Lv	Livermorium	293	Solid (a theoretical prediction)	[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁴
117	Ts	Tennessine	294	Solid (a theoretical prediction)	[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵
118	Og	Oganesson	294	Solid (a theoretical prediction)	[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶

Frequently asked questions

How many elements are in period 7 of the periodic table?

Period 7 of the periodic table has 32 elements.

Which elements are in period 7?

The elements of period 7 run from Francium to Oganesson: Francium (Fr), Radium (Ra), Actinium (Ac), Thorium (Th), Protactinium (Pa), Uranium (U), Neptunium (Np), Plutonium (Pu), Americium (Am), Curium (Cm), Berkelium (Bk), Californium (Cf), Einsteinium (Es), Fermium (Fm), Mendelevium (Md), Nobelium (No), Lawrencium (Lr), Rutherfordium (Rf), Dubnium (Db), Seaborgium (Sg), Bohrium (Bh), Hassium (Hs), Meitnerium (Mt), Darmstadtium (Ds), Roentgenium (Rg), Copernicium (Cn), Nihonium (Nh), Flerovium (Fl), Moscovium (Mc), Livermorium (Lv), Tennessine (Ts) and Oganesson (Og).