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Beryllium
Space Group Name of Gold
Bi (Symbol of Bismuth)
77 (Atomic Number of Iridium)
Atomic Mass of Europium in lb

Tc

Technetium

Properties

Isotopes

Electrons

38 known isotopes (0 stable, 38 radioactive)

Show stable only

⁸⁵Tc

Mass

84.950778 u

Abundance

—

Half-life

100 nanoseconds

Spin/Parity

—

Decay Mode(s)

Unknown

⁸⁶Tc

Mass

85.944637 u

Abundance

—

Half-life

55 milliseconds

Spin/Parity

(0+)

Decay Mode(s)

EC/β⁺ (100%)

⁸⁷Tc

Mass

86.938067 u

Abundance

—

Half-life

2.2 seconds

Spin/Parity

(9/2+)

Decay Mode(s)

EC/β⁺ (100%)

⁸⁸Tc

Mass

87.933794 u

Abundance

—

Half-life

6.4 seconds

Spin/Parity

(5+ 6+ 7+)

Decay Mode(s)

EC/β⁺ (100%)

⁸⁹Tc

Mass

88.927649 u

Abundance

—

Half-life

12.8 seconds

Spin/Parity

(9/2+)

Decay Mode(s)

EC/β⁺ (100%)

⁹⁰Tc

Mass

89.924074 u

Abundance

—

Half-life

49.2 seconds

Spin/Parity

(8+)

Decay Mode(s)

Electron capture (100%)

⁹¹Tc

Mass

90.918425 u

Abundance

—

Half-life

3.14 m

Spin/Parity

(9/2)+

Decay Mode(s)

EC/β⁺ (100%)

⁹²Tc

Mass

91.915270 u

Abundance

—

Half-life

4.25 m

Spin/Parity

(8)+

Decay Mode(s)

EC/β⁺ (100%)

⁹³Tc

Mass

92.910245 u

Abundance

—

Half-life

2.75 h

Spin/Parity

9/2+

Decay Mode(s)

EC/β⁺ (100%)

⁹⁴Tc

Mass

93.909652 u

Abundance

—

Half-life

293 m

Spin/Parity

Decay Mode(s)

EC/β⁺ (100%)

⁹⁵Tc

Mass

94.907652 u

Abundance

—

Half-life

20.0 h

Spin/Parity

9/2+

Decay Mode(s)

EC/β⁺ (100%)

⁹⁶Tc

Mass

95.907867 u

Abundance

—

Half-life

4.28 d

Spin/Parity

Decay Mode(s)

EC/β⁺ (100%)

⁹⁷Tc

Mass

96.906361 u

Abundance

—

Half-life

4.21E+6 years

Spin/Parity

9/2+

Decay Mode(s)

Electron capture (100%)

⁹⁸Tc

Mass

97.907211 u

Abundance

—

Half-life

4.2E+6 years

Spin/Parity

(6)+

Decay Mode(s)

β⁻ (100%)

⁹⁹Tc

Mass

98.906250 u

Abundance

—

Half-life

2.111E+5 years

Spin/Parity

9/2+

Decay Mode(s)

β⁻ (100%)

¹⁰⁰Tc

Mass

99.907653 u

Abundance

—

Half-life

15.65 seconds

Spin/Parity

Decay Mode(s)

β⁻ (99.9974%), Electron capture (0.0026%)

¹⁰¹Tc

Mass

100.907305 u

Abundance

—

Half-life

14.22 m

Spin/Parity

9/2+

Decay Mode(s)

β⁻ (100%)

¹⁰²Tc

Mass

101.909207 u

Abundance

—

Half-life

5.28 seconds

Spin/Parity

Decay Mode(s)

β⁻ (100%)

¹⁰³Tc

Mass

102.909174 u

Abundance

—

Half-life

54.2 seconds

Spin/Parity

5/2+

Decay Mode(s)

β⁻ (100%)

¹⁰⁴Tc

Mass

103.911434 u

Abundance

—

Half-life

18.3 m

Spin/Parity

(3+)

Decay Mode(s)

β⁻ (100%)

¹⁰⁵Tc

Mass

104.911662 u

Abundance

—

Half-life

7.64 m

Spin/Parity

(3/2-)

Decay Mode(s)

β⁻ (100%)

¹⁰⁶Tc

Mass

105.914357 u

Abundance

—

Half-life

35.6 seconds

Spin/Parity

(1 2)

Decay Mode(s)

β⁻ (100%)

¹⁰⁷Tc

Mass

106.915458 u

Abundance

—

Half-life

21.2 seconds

Spin/Parity

(3/2-)

Decay Mode(s)

β⁻ (100%)

¹⁰⁸Tc

Mass

107.918493 u

Abundance

—

Half-life

5.17 seconds

Spin/Parity

(2)+

Decay Mode(s)

β⁻ (100%)

¹⁰⁹Tc

Mass

108.920254 u

Abundance

—

Half-life

0.91 seconds

Spin/Parity

(5/2+)

Decay Mode(s)

β⁻ (100%), β⁻n (0.08%)

¹¹⁰Tc

Mass

109.923741 u

Abundance

—

Half-life

0.900 seconds

Spin/Parity

(2 3+)

Decay Mode(s)

β⁻ (100%), β⁻n (0.04%)

¹¹¹Tc

Mass

110.925899 u

Abundance

—

Half-life

290 milliseconds

Spin/Parity

(5/2+)

Decay Mode(s)

β⁻ (100%), β⁻n (0.85%)

¹¹²Tc

Mass

111.929942 u

Abundance

—

Half-life

271 milliseconds

Spin/Parity

(2+)

Decay Mode(s)

β⁻ (100%), β⁻n (1.5%)

¹¹³Tc

Mass

112.932569 u

Abundance

—

Half-life

152 milliseconds

Spin/Parity

(5/2+)

Decay Mode(s)

β⁻ (100%), β⁻n (2.1%)

¹¹⁴Tc

Mass

113.937090 u

Abundance

—

Half-life

100 milliseconds

Spin/Parity

(GE 4)

Decay Mode(s)

β⁻ (100%)

¹¹⁵Tc

Mass

114.940100 u

Abundance

—

Half-life

78 milliseconds

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

¹¹⁶Tc

Mass

115.945020 u

Abundance

—

Half-life

57 milliseconds

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

¹¹⁷Tc

Mass

116.948320 u

Abundance

—

Half-life

44.5 milliseconds

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

¹¹⁸Tc

Mass

117.953526 u

Abundance

—

Half-life

30 milliseconds

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

¹¹⁹Tc

Mass

118.956876 u

Abundance

—

Half-life

22 milliseconds

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

¹²⁰Tc

Mass

119.962426 u

Abundance

—

Half-life

21 milliseconds

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

¹²¹Tc

Mass

120.966140 u

Abundance

—

Half-life

22 milliseconds

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

¹²²Tc

Mass

121.971760 u

Abundance

—

Half-life

Unknown

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

Decay mode abbreviations:

β⁻ = Beta minus decay, β⁺ = Beta plus decay, EC = Electron capture, α = Alpha decay

n = Neutron emission, p = Proton emission, SF = Spontaneous fission, IT = Isomeric transition

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