Actinide
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The actinide series is the 15 chemical elements between actinium and lawrencium on the periodic table. They have the atomic numbers between 89 - 103. The actinide series is named after actinium. All of the elements are radioactive. Uranium is the most common natural actinide, and thorium second.
The actinide elements[change | change source]
| Atomic Number | Name | Symbol | Picture |
|---|---|---|---|
| 89 | Actinium | Ac | − |
| 90 | Thorium | Th | 
|
| 91 | Protactinium | Pa | − |
| 92 | Uranium | U | 
|
| 93 | Neptunium | Np | 
|
| 94 | Plutonium | Pu | 
|
| 95 | Americium | Am | 
|
| 96 | Curium | Cm | − |
| 97 | Berkelium | Bk | 
|
| 98 | Californium | Cf | 
|
| 99 | Einsteinium | Es | 
|
| 100 | Fermium | Fm | − |
| 101 | Mendelevium | Md | − |
| 102 | Nobelium | No | − |
| 103 | Lawrencium | Lr | − |
Periodic table
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| H | He | ||||||||||||||||||||||||||||||||||||||||
| Li | Be | B | C | N | O | F | Ne | ||||||||||||||||||||||||||||||||||
| Na | Mg | Al | Si | P | S | Cl | Ar | ||||||||||||||||||||||||||||||||||
| K | Ca | Sc | Ti | V | Cr | Mn | Fe | Co | Ni | Cu | Zn | Ga | Ge | As | Se | Br | Kr | ||||||||||||||||||||||||
| Rb | Sr | Y | Zr | Nb | Mo | Tc | Ru | Rh | Pd | Ag | Cd | In | Sn | Sb | Te | I | Xe | ||||||||||||||||||||||||
| Cs | Ba | La | Ce | Pr | Nd | Pm | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | Hf | Ta | W | Re | Os | Ir | Pt | Au | Hg | Tl | Pb | Bi | Po | At | Rn | ||||||||||
| Fr | Ra | Ac | Th | Pa | U | Np | Pu | Am | Cm | Bk | Cf | Es | Fm | Md | No | Lr | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | Cn | Nh | Fl | Mc | Lv | Ts | Og | ||||||||||
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