Tellurium-121 (Te-121)

Identity

Protons

52

Neutrons

69

Mass number

121

Mass

121 ± 28 u

Mass excess

-88.543 MeV

Spin

1/2+

Stability

Half-life: 19.3 days

Natural occurrence

Not found in nature

Decays to

• positron emission → Sb-121