Radioactive Element
There are stable and unstable atoms. Stable atoms remain the same forever. Radioactivity comes from unstable atoms having too much energy, breaking down and decaying. During this process new atoms are created.
Radioactive Element |
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Element Name | Element Symbol | Atomic Number | Periodic Group Number | Periodic Period Number |
Actinium | Ac | 89 | 3 | 7 |
Americium | Am | 95 | - | 7 |
Astatine | At | 85 | 17 | 6 |
Berkelium | Bk | 97 | - | 7 |
Bohrium | Bh | 107 | 7 | 7 |
Californium | Cf | 98 | - | 7 |
Curium | Cm | 96 | - | 7 |
Darmstadtium | Ds | 110 | 10 | 7 |
Dubnium | Db | 105 | 5 | 7 |
Einsteinium | Es | 99 | - | 7 |
Fermium | Fm | 100 | - | 7 |
Francium | Fr | 87 | 1 | 7 |
Hassium | Hs | 108 | 8 | 7 |
Lawrencium | Lr | 103 | 3 | 7 |
Meitnerium | Mt | 109 | 9 | 7 |
Mendelevium | Md] | 101 | - | 7 |
Neptunium | Np | 93 | - | 7 |
Nobelium | No | 102 | - | 7 |
Plutonium | Pu | 94 | - | 7 |
Polonium | Po | 84 | 16 | 6 |
Promethium | Pm | 61 | - | 6 |
Protactinium | Pa | 91 | - | 7 |
Radium | Ra | 88 | 2 | 7 |
Radon | Rn | 86 | 18 | 6 |
Roentgenium | Rg | 111 | 11 | 7 |
Rutherfordium | Rf | 104 | 4 | 7 |
Seaborgium | Sg | 106 | 6 | 7 |
Technetium | Tc | 43 | 7 | 5 |
Thorium | Th | 90 | - | 7 |
Ununbium | Uub | 112 | 12 | 7 |
Ununhexium | Uuh | 116 | 16 | 7 |
Ununoctium | Uuo | 118 | 18 | 7 |
Ununpentium | Uup | 115 | 15 | 7 |
Ununquadium | Uuq | 114 | 14 | 7 |
Ununseptium | Uus | 117 | 17 | 7 |
Ununtrium | Uut | 113 | 13 | 7 |
Uranium | U | 92 | - | 7 |