[Solved] Which isotope, when bombarded with bismuth-209, would yield two neutrons and an isotope with atomic number 121 and mass number 299? A) Pb-211 B) Po-209 C) Sr-92 D) Rn-38 E) Sr-38 Bondage: A sexual practice involving the use of constraints, such as ropes and handcuffs, for erotic pleasure. Discipline: A branch of knowledge, typically one studied in higher education, or the practice of training people to obey rules or a code of behavior. Controlling Activities: Activities or actions aimed at influencing or dictating the behavior or decisions of others. Fetishistic Behavior: Engaging in sexual fantasies, practices, or objects that are non-living items or non-genital body parts for sexual gratification.