Isotope

Isotopic Mass

amu

% Abundance

T_1/2

T_1/2

Units

Mass Excess

KeV

Binding Energy

Per Nucleon

KeV

Decay

Mode

Branching

Ratio

²⁴⁸No

248.08660 (32)

<2

us

80,660 (300)

7,424 (1)

SF ?

²⁴⁹No

249.08783 (37)

57

us

81,820 (340)

7,422 (1)

B+ ?

²⁵⁰No

250.08751 (22)

5.7

us

81,520 (200)

7,426 (1)

SF~100

²⁵¹No

251.08901 (19)

760

ms

82,910 (180)

7,423 (1)

A

83 16

²⁵²No

252.088977 (14)

2.44

s

82,881 (13)

7,425.76 (5.2)

A~67

²⁵³No

253.09068 (11)

1.62

m

84,470 (100)

7,422 (0)

A

?

²⁵⁴No

254.090955 (19)

51

s

84,724 (18)

7,423.59 (6.9)

A

90 4

²⁵⁵No

255.093241 (11)

3.1

m

86,854 (10)

7,417.78 (4)

A

61 3

²⁵⁶No

256.0942827 (85)

2.91

s

87,823.7 (7.9)

7,416.54 (3.1)

A~100

²⁵⁷No

257.096877 (23)

25

s

90,241 (22)

7,409.68 (8.4)

A

?

²⁵⁸No

258.09821 (22)

1.2

ms

91,480 (200)

7,407 (1)

SF~100

²⁵⁹No

259.10103 (11)

58

m

94,110 (100)

7,400 (0)

A

75 4

²⁶⁰No

260.10264 (22)

106

ms

95,610 (200)

7,397 (1)

SF

100

²⁶¹No

261.10575 (32)

3

h

98,500 (300)

7,388 (1)

A ?

²⁶²No

262.10730 (48)

~5

ms

99,950 (450)

7,385 (2)

SF~100

²⁶³No

263.11055 (53)

20

m

102,980 (490)

7,376 (2)

A ?

²⁶⁴No

264.11235 (69)

1

m

104,650 (640)

7,373 (2)

A ?

^251mNo

251.08901 (19)

1.7

s

82,910 (180)

7,423 (1)

A

100

^253mNo

253.09068 (11)

31

us

84,470 (100)

7,422 (0)

A

?

^254mNo

254.090955 (19)

280

ms

84,724 (18)

7,423.59 (6.9)

IT>80

^255mNo

255.093241 (11)

86,854 (10)

7,417.78 (4)

0

^257mNo

257.096877 (23)

90,241 (22)

7,409.68 (8.4)

0

^259mNo

259.10103 (11)

94,110 (100)

7,400 (0)

0