Non-mononuclidic elements are marked with an asterisk, and the long-lived primordial radioisotope given. In two cases (indium and rhenium), the most abundant naturally occurring isotope is the mildly radioactive one, and in the case of europium, nearly half of it is.
# Beryllium-9
# Fluorine-19
# Sodium-23
# Aluminium-27
# Phosphorus-31
# Scandium-45
# Vanadium-51* naturally occurs with 0.25% of radioactive vanadium-50
# Manganese-55
# Cobalt-59
# Arsenic-75
# Rubidium-85* naturally occurs with 27.835% of radioactive rubidium-87
# Yttrium-89
# Niobium-93
# Rhodium-103
# Indium-113* naturally occurs with majority (95.7%) radioactive isotope indium-115
# Iodine-127
# Caesium-133
# Lanthanum-139* naturally occurs with 0.09% radioactive lanthanum-138
# Praseodymium-141
# Europium-153* naturally occurs with 47.8% radioactive europium-151
# Terbium-159
# Holmium-165
# Thulium-169
# Lutetium-175* naturally occurs with 2.59% radioactive lutetium-176
# Rhenium-185* naturally occurs with majority (62.6%) radioactive isotope rhenium-187
# Gold-197