Periodic Table/Ruthenium/¹²¹Ru

← 120Ru122Ru →

¹²¹Ru

Ruthenium-121

Radioactive· Half-life: 29.0 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

44

Neutrons (N)

77

Mass Number (A)

121

Atomic Mass

120.952098AMU

Spin / Parity

3/2+

Binding E/A

7.970keV

Natural Abundance

Trace / None

Half-life

29.0 ms

Decay Modesoverview · half-life · α · β⁻ · β⁺

β⁻

100.0%

β⁻n

2n

Decay Chain

¹²¹RuRuthenium29.0 ms

β⁻100.0%

β⁻n¹²⁰Rh

2n¹¹⁹Ru

¹²¹RhRhodium74.0 ms

β⁻100.0%

β⁻n¹²⁰Pd11.0%

¹²¹PdPalladium290 ms

β⁻100.0%

β⁻n¹²⁰Ag0.80%

¹²¹AgSilver777 ms

β⁻100.0%

β⁻n¹²⁰Cd0.08%

¹²¹CdCadmium13.5 s

β⁻100.0%

¹²¹InIndium23.1 s

β⁻100.0%

¹²¹SnTin1.13 d

β⁻100.0%

¹²¹SbAntimonySTABLE

8-step decay chain → stable · Primary path shown · branching ratios indicated

Other Isotopes of Ruthenium

85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125

← Back to RutheniumData: IAEA NDS · ENSDF