Period 7
7 elements in this period. All elements in the same period occupy the same number of electron shells.
32 elements
87
Fr
Francium
223.02
88
Ra
Radium
226.025
89
Ac
Actinium
227.028
90
Th
Thorium
232.038
91
Pa
Protactinium
231.036
92
U
Uranium
238.029
93
Np
Neptunium
237.048
94
Pu
Plutonium
244.064
95
Am
Americium
243.061
96
Cm
Curium
247.07
97
Bk
Berkelium
247.07
98
Cf
Californium
251.08
99
Es
Einsteinium
252.083
100
Fm
Fermium
257.095
101
Md
Mendelevium
258.098
102
No
Nobelium
259.101
103
Lr
Lawrencium
266.12
104
Rf
Rutherfordium
267.122
105
Db
Dubnium
268.126
106
Sg
Seaborgium
269.128
107
Bh
Bohrium
270.133
108
Hs
Hassium
269.134
109
Mt
Meitnerium
277.154
110
Ds
Darmstadtium
282.166
111
Rg
Roentgenium
282.169
112
Cn
Copernicium
286.179
113
Nh
Nihonium
286.182
114
Fl
Flerovium
290.192
115
Mc
Moscovium
290.196
116
Lv
Livermorium
293.205
117
Ts
Tennessine
294.211
118
Og
Oganesson
295.216
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