Actinide Elements
Actinides (elements 89-103) are radioactive metals. Uranium and plutonium are used in nuclear energy and weapons.
15 elements
89Ac
Actinium
227.02775 uSolidEN: 1.1
90Th
Thorium
232.038 uSolidEN: 1.3
91Pa
Protactinium
231.03588 uSolidEN: 1.5
92U
Uranium
238.0289 uSolidEN: 1.38
93Np
Neptunium
237.048172 uSolidEN: 1.36
94Pu
Plutonium
244.06420 uSolidEN: 1.28
95Am
Americium
243.061380 uSolidEN: 1.3
96Cm
Curium
247.07035 uSolidEN: 1.3
97Bk
Berkelium
247.07031 uSolidEN: 1.3
98Cf
Californium
251.07959 uSolidEN: 1.3
99Es
Einsteinium
252.0830 uSolidEN: 1.3
100Fm
Fermium
257.09511 uSolidEN: 1.3
101Md
Mendelevium
258.09843 uSolidEN: 1.3
102No
Nobelium
259.10100 uSolidEN: 1.3
103Lr
Lawrencium
266.120 uSolidEN: 1.3
Property Comparison
| # | Symbol | Name | Mass (u) | State | MP (K) | BP (K) | EN | Density |
|---|---|---|---|---|---|---|---|---|
| 89 | Ac | Actinium | 227.02775 | Solid | 1324 | 3471 | 1.1 | 10.07 |
| 90 | Th | Thorium | 232.038 | Solid | 2023 | 5061 | 1.3 | 11.72 |
| 91 | Pa | Protactinium | 231.03588 | Solid | 1845 | — | 1.5 | 15.37 |
| 92 | U | Uranium | 238.0289 | Solid | 1408 | 4404 | 1.38 | 18.95 |
| 93 | Np | Neptunium | 237.048172 | Solid | 917 | 4175 | 1.36 | 20.25 |
| 94 | Pu | Plutonium | 244.06420 | Solid | 913 | 3501 | 1.28 | 19.84 |
| 95 | Am | Americium | 243.061380 | Solid | 1449 | 2284 | 1.3 | 13.69 |
| 96 | Cm | Curium | 247.07035 | Solid | 1618 | 3400 | 1.3 | 13.51 |
| 97 | Bk | Berkelium | 247.07031 | Solid | 1323 | — | 1.3 | 14 |
| 98 | Cf | Californium | 251.07959 | Solid | 1173 | — | 1.3 | — |
| 99 | Es | Einsteinium | 252.0830 | Solid | 1133 | — | 1.3 | — |
| 100 | Fm | Fermium | 257.09511 | Solid | 1800 | — | 1.3 | — |
| 101 | Md | Mendelevium | 258.09843 | Solid | 1100 | — | 1.3 | — |
| 102 | No | Nobelium | 259.10100 | Solid | 1100 | — | 1.3 | — |
| 103 | Lr | Lawrencium | 266.120 | Solid | 1900 | — | 1.3 | — |