Talk:A Bont of Friendship/@comment-21504612-20131230071707/@comment-17124362-20131230082051

Depends on the isotope. There are 15 isotopes of Mendelevium with Mendelevium-256's half-life of 77 minutes to Mendelevium-258's half-life pf 51.5 days. The 87 minute one is probably the most common.