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Seaborgium
Isotopes Known of Krypton
Ir (Symbol of Iridium)
74 (Atomic Number of Tungsten)
Ionization Energies of Terbium in J/mol

Lu

Lutetium

Properties

Isotopes

Electrons

40 known isotopes (1 stable, 39 radioactive)

Show stable only

¹⁴⁹Lu

Mass

— u

Abundance

—

Half-life

0.45 microseconds

Spin/Parity

(11/2-)

Decay Mode(s)

Proton emission (100%)

¹⁵⁰Lu

Mass

149.973407 u

Abundance

—

Half-life

45 milliseconds

Spin/Parity

(2+)

Decay Mode(s)

Proton emission (70.9%), EC/β⁺ (29.1%)

¹⁵¹Lu

Mass

150.967471 u

Abundance

—

Half-life

80.6 milliseconds

Spin/Parity

11/2-

Decay Mode(s)

Proton emission (63.4%), EC/β⁺ (36.6%)

¹⁵²Lu

Mass

151.964120 u

Abundance

—

Half-life

0.7 seconds

Spin/Parity

(4- 5- 6-)

Decay Mode(s)

EC/β⁺ (100%), β⁺p (15%)

¹⁵³Lu

Mass

152.958802 u

Abundance

—

Half-life

0.9 seconds

Spin/Parity

11/2-

Decay Mode(s)

Unknown

¹⁵⁴Lu

Mass

153.957416 u

Abundance

—

Half-life

Unknown

Spin/Parity

(2-)

Decay Mode(s)

Unknown

¹⁵⁵Lu

Mass

154.954326 u

Abundance

—

Half-life

68 milliseconds

Spin/Parity

11/2-

Decay Mode(s)

α (90%), EC/β⁺ (10%)

¹⁵⁶Lu

Mass

155.953087 u

Abundance

—

Half-life

494 milliseconds

Spin/Parity

(2)-

Decay Mode(s)

α (95%), EC/β⁺ (5%)

¹⁵⁷Lu

Mass

156.950145 u

Abundance

—

Half-life

6.8 seconds

Spin/Parity

(1/2+ 3/2+)

Decay Mode(s)

α (0%)

¹⁵⁸Lu

Mass

157.949316 u

Abundance

—

Half-life

10.6 seconds

Spin/Parity

(2)-

Decay Mode(s)

EC/β⁺ (99.09%), α (0.91%)

¹⁵⁹Lu

Mass

158.946636 u

Abundance

—

Half-life

12.1 seconds

Spin/Parity

—

Decay Mode(s)

EC/β⁺ (100%), α (0.1%)

¹⁶⁰Lu

Mass

159.946033 u

Abundance

—

Half-life

36.1 seconds

Spin/Parity

—

Decay Mode(s)

EC/β⁺ (100%), α (0.0001%)

¹⁶¹Lu

Mass

160.943572 u

Abundance

—

Half-life

77 seconds

Spin/Parity

1/2+

Decay Mode(s)

EC/β⁺ (100%)

¹⁶²Lu

Mass

161.943283 u

Abundance

—

Half-life

1.37 m

Spin/Parity

Decay Mode(s)

EC/β⁺ (100%)

¹⁶³Lu

Mass

162.941179 u

Abundance

—

Half-life

3.97 m

Spin/Parity

1/2(+)

Decay Mode(s)

EC/β⁺ (100%)

¹⁶⁴Lu

Mass

163.941339 u

Abundance

—

Half-life

3.14 m

Spin/Parity

1(-)

Decay Mode(s)

EC/β⁺ (100%)

¹⁶⁵Lu

Mass

164.939407 u

Abundance

—

Half-life

10.74 m

Spin/Parity

1/2+

Decay Mode(s)

EC/β⁺ (100%)

¹⁶⁶Lu

Mass

165.939859 u

Abundance

—

Half-life

2.65 m

Spin/Parity

Decay Mode(s)

EC/β⁺ (100%)

¹⁶⁷Lu

Mass

166.938243 u

Abundance

—

Half-life

51.5 m

Spin/Parity

7/2+

Decay Mode(s)

EC/β⁺ (100%)

¹⁶⁸Lu

Mass

167.938730 u

Abundance

—

Half-life

5.5 m

Spin/Parity

6(-)

Decay Mode(s)

EC/β⁺ (100%)

¹⁶⁹Lu

Mass

168.937646 u

Abundance

—

Half-life

34.06 h

Spin/Parity

7/2+

Decay Mode(s)

EC/β⁺ (100%)

¹⁷⁰Lu

Mass

169.938479 u

Abundance

—

Half-life

2.012 d

Spin/Parity

Decay Mode(s)

EC/β⁺ (100%)

¹⁷¹Lu

Mass

170.937919 u

Abundance

—

Half-life

8.247 d

Spin/Parity

7/2+

Decay Mode(s)

EC/β⁺ (100%)

¹⁷²Lu

Mass

171.939091 u

Abundance

—

Half-life

6.70 d

Spin/Parity

Decay Mode(s)

EC/β⁺ (100%)

¹⁷³Lu

Mass

172.938936 u

Abundance

—

Half-life

1.37 years

Spin/Parity

7/2+

Decay Mode(s)

Electron capture (100%)

¹⁷⁴Lu

Mass

173.940343 u

Abundance

—

Half-life

3.31 years

Spin/Parity

(1)-

Decay Mode(s)

EC/β⁺ (100%)

¹⁷⁵Lu Stable

Mass

174.940777 u

Abundance

97.4010%

Half-life

Stable

Spin/Parity

7/2+

Decay Mode(s)

—

¹⁷⁶Lu

Mass

175.942692 u

Abundance

2.5990%

Half-life

3.76E+10 years

Spin/Parity

Decay Mode(s)

β⁻ (100%)

¹⁷⁷Lu

Mass

176.943764 u

Abundance

—

Half-life

6.6443 d

Spin/Parity

7/2+

Decay Mode(s)

β⁻ (100%)

¹⁷⁸Lu

Mass

177.945960 u

Abundance

—

Half-life

28.4 m

Spin/Parity

1(+)

Decay Mode(s)

β⁻ (100%)

¹⁷⁹Lu

Mass

178.947333 u

Abundance

—

Half-life

4.59 h

Spin/Parity

7/2+

Decay Mode(s)

β⁻ (100%)

¹⁸⁰Lu

Mass

179.949891 u

Abundance

—

Half-life

5.7 m

Spin/Parity

Decay Mode(s)

β⁻ (100%)

¹⁸¹Lu

Mass

180.951908 u

Abundance

—

Half-life

3.5 m

Spin/Parity

(7/2+)

Decay Mode(s)

β⁻ (100%)

¹⁸²Lu

Mass

181.955158 u

Abundance

—

Half-life

2.0 m

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

¹⁸³Lu

Mass

182.957363 u

Abundance

—

Half-life

58 seconds

Spin/Parity

(7/2+)

Decay Mode(s)

β⁻ (100%)

¹⁸⁴Lu

Mass

183.961030 u

Abundance

—

Half-life

19 seconds

Spin/Parity

(3+)

Decay Mode(s)

β⁻ (100%)

¹⁸⁵Lu

Mass

184.963542 u

Abundance

—

Half-life

160 nanoseconds

Spin/Parity

—

Decay Mode(s)

Unknown

¹⁸⁶Lu

Mass

185.967450 u

Abundance

—

Half-life

Unknown

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

¹⁸⁷Lu

Mass

186.970188 u

Abundance

—

Half-life

Unknown

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

¹⁸⁸Lu

Mass

187.974428 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

Conversions Print

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Atomic Mass

Series

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Nonmetals