| 1 | A | B | C | D | E |
| --- | --- | --- | --- | --- | --- |
| 2 | Seaborgium - Isotopes |  |  |  |  |
| 3 | Isotope | Half-life | Decay mode | Discovery year | Reaction |
| 4 | 258Sg | 3 ms | SF | 1994 | 209Bi(51V,2n) |
| 5 | 259Sg | 600 ms | α | 1985 | 207Pb(54Cr,2n) |
| 6 | 260Sg | 4 ms | SF, α | 1985 | 208Pb(54Cr,2n) |
| 7 | 261Sg | 200 ms | α, EC, SF | 1985 | 208Pb(54Cr,n) |
| 8 | 261mSg | 92 μs | IT | 2009 | 208Pb(54Cr,n) |
| 9 | 262Sg | 7 ms | SF, α | 2001 | 270Ds(—,2α) |
| 10 | 263Sg | 1 s | α | 1994 | 271Ds(—,2α) |
| 11 | 263mSg | 120 ms | α, SF | 1974 | 249Cf(18O,4n) |
| 12 | 264Sg | 37 ms | SF | 2006 | 238U(34Si,4n) |
| 13 | 265Sg | 8 s | α | 1993 | 248Cm(22Ne,5n) |
| 14 | 265mSg | 16.2 s | α | 1993 | 248Cm(22Ne,5n) |
| 15 | 266Sg | 360 ms | SF | 2004 | 270Hs(—,α) |
| 16 | 267Sg | 1.4 min | SF, α | 2004 | 271Hs(—,α) |
| 17 | 269Sg | 14 min | α | 2010 | 285Fl(—,4α) |
| 18 | 271Sg | 2.4 min | α | 2003 | 287Fl(—,4α) |

Question: What isotopes of Seaborgium are produced in the ²⁴⁸Cm(²²Ne,5n) reaction? 
Answer: The isotope ²⁶⁵Sg and its isomer ²⁶⁵ᵐSg are produced in the ²⁴⁸Cm(²²Ne,5n) reaction.