
Period 7 elements
Period 7 holds all 15 actinides plus the superheavy synthetic elements up to oganesson. Most are radioactive and many exist only in microgram quantities created in particle accelerators.
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87
223
Fr
Francium
Alkali Metal
88
226
Ra
Radium
Alkaline Earth Metal
89
227
Ac
Actinium
Actinide
90
232.038
Th
Thorium
Actinide
91
231.036
Pa
Protactinium
Actinide
92
238.029
U
Uranium
Actinide
93
237
Np
Neptunium
Actinide
94
244
Pu
Plutonium
Actinide
95
243
Am
Americium
Actinide
96
247
Cm
Curium
Actinide
97
247
Bk
Berkelium
Actinide
98
251
Cf
Californium
Actinide
99
252
Es
Einsteinium
Actinide
100
257
Fm
Fermium
Actinide
101
258
Md
Mendelevium
Actinide
102
259
No
Nobelium
Actinide
103
262
Lr
Lawrencium
Actinide
104
261
Rf
Rutherfordium
Transition Metal
105
268
Db
Dubnium
Transition Metal
106
269
Sg
Seaborgium
Transition Metal
107
270.133
Bh
Bohrium
Transition Metal
108
269
Hs
Hassium
Transition Metal
109
277.154
Mt
Meitnerium
Unknown
110
281
Ds
Darmstadtium
Unknown
111
281
Rg
Roentgenium
Unknown
112
285
Cn
Copernicium
Transition Metal
113
286
Nh
Nihonium
Unknown
114
289
Fl
Flerovium
Post-Transition Metal
115
288
Mc
Moscovium
Unknown
116
293
Lv
Livermorium
Unknown
117
294
Ts
Tennessine
Unknown
118
294
Og
Oganesson
Noble Gas