CREATE TABLE table_name_28 (decay_mode VARCHAR, discovery_year VARCHAR, isotope VARCHAR)

What is the decay mode of the 265m hs isotope discovered in 1984?
SELECT decay_mode FROM table_name_28 WHERE discovery_year = "1984" AND isotope = "265m hs"
SELECT "decay_mode" FROM "table_name_28" WHERE "1984" = "discovery_year" AND "265m hs" = "isotope"