Actinide
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Các nguyên tố phóng xạ có số nguyên tử từ 89 đến 103. Chúng được đặc trưng bởi sự lấp đầy các orbital electron 5f. Tất cả actinide đều có tính phóng xạ, trong đó uranium và thorium là các thành viên tự nhiên phổ biến nhất.
89
Solid
Ac
Actinium
227,0 u
MP: —
BP: —
90
Solid
Th
Thorium
232,04 u
MP: —
BP: —
91
Solid
Pa
Protactinium
231,04 u
MP: —
BP: —
92
Solid
U
Uranium
238,03 u
MP: —
BP: —
93
Solid
Np
Neptunium
237,0 u
MP: —
BP: —
94
Solid
Pu
Plutonium
244,0 u
MP: —
BP: —
95
Solid
Am
Americium
243,0 u
MP: —
BP: —
96
Solid
Cm
Curium
247,0 u
MP: —
BP: —
97
Solid
Bk
Berkelium
247,0 u
MP: —
BP: —
98
Solid
Cf
Californium
251,0 u
MP: —
BP: —
99
Solid
Es
Einsteinium
252,0 u
MP: —
BP: —
100
Solid
Fm
Fermium
257,0 u
MP: —
BP: —
101
Solid
Md
Mendelevium
258,0 u
MP: —
BP: —
102
Solid
No
Nobelium
259,0 u
MP: —
BP: —
103
Solid
Lr
Lawrencium
266,0 u
MP: —
BP: —
Bảng so sánh
| # | Ký hiệu | Tên | Khối lượng (u) | Đ. nóng chảy | Đ. sôi | Mật độ | Pha |
|---|---|---|---|---|---|---|---|
| 89 | Ac | Actinium | 227,0 | — | — | — | Solid |
| 90 | Th | Thorium | 232,04 | — | — | — | Solid |
| 91 | Pa | Protactinium | 231,04 | — | — | — | Solid |
| 92 | U | Uranium | 238,03 | — | — | — | Solid |
| 93 | Np | Neptunium | 237,0 | — | — | — | Solid |
| 94 | Pu | Plutonium | 244,0 | — | — | — | Solid |
| 95 | Am | Americium | 243,0 | — | — | — | Solid |
| 96 | Cm | Curium | 247,0 | — | — | — | Solid |
| 97 | Bk | Berkelium | 247,0 | — | — | — | Solid |
| 98 | Cf | Californium | 251,0 | — | — | — | Solid |
| 99 | Es | Einsteinium | 252,0 | — | — | — | Solid |
| 100 | Fm | Fermium | 257,0 | — | — | — | Solid |
| 101 | Md | Mendelevium | 258,0 | — | — | — | Solid |
| 102 | No | Nobelium | 259,0 | — | — | — | Solid |
| 103 | Lr | Lawrencium | 266,0 | — | — | — | Solid |