99Tc

Technetium-99

Radioactive· Half-life: 211 ky

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

43

Neutrons (N)

56

Mass Number (A)

99

Atomic Mass

98.906250AMU

Spin / Parity

9/2+

Binding E/A

8.392keV

Natural Abundance

Trace / None

Half-life

211 ky

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

β⁻
100.0%

Decay Chain

2-step decay chain → stable · Primary path shown

Medical Applications

DiagnosticTc-99

Most widely used diagnostic isotope (SPECT imaging)

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