The element antimony has two stable isotopes, antimony-121 with an atomic mass of 120.9038 amu and antimony-123 with an atomic mass of 122.9041 amu. From the atomic mass of Sb =

121.75 one can conclude that: antimony-121 has the highest percent natural abundance O antimony-123 has the highest percent natural abundance both isotopes have the same percent natural abundance Submit Answer Retry Entire Group 2 more group attempts remaining