Die chemiese element röntgenium (Rg), met ’n atoommassa van ongeveer 280 u, het geen stabiele isotope nie en word dus as ’n radioaktiewe element geklassifiseer.
Die sewe isotope is onstabiel en het ’n relatief kort halfleeftyd (die meeste minder as ’n sekonde).
In die natuur kom geen röntgenium voor nie; alle isotope is sinteties in ’n laboratorium berei. Die eerste sintetiese isotoop was 272Rg, in 1994.
Die kortslewende isotoop van röntgenium is 272Rg, met ’n halfleeftyd van ongeveer 2 millisekondes. Die langslewende een is 281Rg, met ’n halfleeftyd van 26 sekondes.
Nuklied | Z (p) | N (n) | Isotopiese massa (u) | Halfleeftyd | Radioaktiewe verval | VP | Kernspin |
---|---|---|---|---|---|---|---|
272Rg | 111 | 161 | 272,15362(36) | 2,0(8) ms | α | 268Mt | 5+, 6+ |
274Rg | 111 | 163 | 274,15525(19) | 6,4 ms | α | 270Mt | |
278Rg | 111 | 167 | 278,16160(68) | 1 s | α | 274Mt | |
279Rg | 111 | 168 | 279,16247(71) | 0,17 s | α | 275Mt | |
280Rg | 111 | 169 | 280,16447(80) | 3,6 s | α | 276Mt | |
281Rg | 111 | 170 | 281,16537(100) | 26 s | SS | ||
282Rg | 111 | 171 | 282,16749(95) | 0,5 s | α | 278Mt |
1H | 2He | 3Li | 4Be | 5B | 6C | 7N | 8O | 9F | 10Ne | 11Na | 12Mg | 13Al | 14Si | 15P | 16S | 17Cl | 18Ar | 19K | |
20Ca | 21Sc | 22Ti | 23V | 24Cr | 25Mn | 26Fe | 27Co | 28Ni | 29Cu | 30Zn | 31Ga | 32Ge | 33As | 34Se | 35Br | 36Kr | 37Rb | 38Sr | 39Y |
40Zr | 41Nb | 42Mo | 43Tc | 44Ru | 45Rh | 46Pd | 47Ag | 48Cd | 49In | 50Sn | 51Sb | 52Te | 53I | 54Xe | 55Cs | 56Ba | 57La | 58Ce | 59Pr |
60Nd | 61Pm | 62Sm | 63Eu | 64Gd | 65Tb | 66Dy | 67Ho | 68Er | 69Tm | 70Yb | 71Lu | 72Hf | 73Ta | 74W | 75Re | 76Os | 77Ir | 78Pt | 79Au |
80Hg | 81Tl | 82Pb | 83Bi | 84Po | 85At | 86Rn | 87Fr | 88Ra | 89Ac | 90Th | 91Pa | 92U | 93Np | 94Pu | 95Am | 96Cm | 97Bk | 98Cf | 99Es |
100Fm | 101Md | 102No | 103Lr | 104Rf | 105Db | 106Sg | 107Bh | 108Hs | 109Mt | 110Ds | 111Rg | 112Cn | 113Nh | 114Fl | 115Mc | 116Lv | 117Ts | 118Og |
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