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Lithium
Critical Temperature of Vanadium
Sm (Symbol of Samarium)
79 (Atomic Number of Gold)
Discovered of Berkelium in h

As

Arsenic

30 known isotopes (1 stable, 29 radioactive)

Show stable only

⁶³As

Mass

62.964036 u

Abundance

—

Half-life

43 nanoseconds

Spin/Parity

3/2-

Decay Mode(s)

Unknown

⁶⁴As

Mass

63.957560 u

Abundance

—

Half-life

69.0 milliseconds

Spin/Parity

—

Decay Mode(s)

EC/β⁺ (100%)

⁶⁵As

Mass

64.949611 u

Abundance

—

Half-life

128 milliseconds

Spin/Parity

—

Decay Mode(s)

EC/β⁺ (100%)

⁶⁶As

Mass

65.944149 u

Abundance

—

Half-life

95.77 milliseconds

Spin/Parity

[0+]

Decay Mode(s)

EC/β⁺ (100%)

⁶⁷As

Mass

66.939251 u

Abundance

—

Half-life

42.5 seconds

Spin/Parity

(5/2-)

Decay Mode(s)

EC/β⁺ (100%)

⁶⁸As

Mass

67.936774 u

Abundance

—

Half-life

151.6 seconds

Spin/Parity

3+

Decay Mode(s)

EC/β⁺ (100%)

⁶⁹As

Mass

68.932246 u

Abundance

—

Half-life

15.2 m

Spin/Parity

5/2-

Decay Mode(s)

EC/β⁺ (100%)

⁷⁰As

Mass

69.930935 u

Abundance

—

Half-life

52.6 m

Spin/Parity

4+

Decay Mode(s)

EC/β⁺ (100%)

⁷¹As

Mass

70.927114 u

Abundance

—

Half-life

65.30 h

Spin/Parity

5/2-

Decay Mode(s)

EC/β⁺ (100%)

⁷²As

Mass

71.926752 u

Abundance

—

Half-life

26.0 h

Spin/Parity

2-

Decay Mode(s)

EC/β⁺ (100%)

⁷³As

Mass

72.923829 u

Abundance

—

Half-life

80.30 d

Spin/Parity

3/2-

Decay Mode(s)

Electron capture (100%)

⁷⁴As

Mass

73.923929 u

Abundance

—

Half-life

17.77 d

Spin/Parity

2-

Decay Mode(s)

EC/β⁺ (66%), β⁻ (34%)

⁷⁵As Stable

Mass

74.921595 u

Abundance

100.0000%

Half-life

Stable

Spin/Parity

3/2-

Decay Mode(s)

—

⁷⁶As

Mass

75.922392 u

Abundance

—

Half-life

26.24 h

Spin/Parity

2-

Decay Mode(s)

β⁻ (100%)

⁷⁷As

Mass

76.920648 u

Abundance

—

Half-life

38.79 h

Spin/Parity

3/2-

Decay Mode(s)

β⁻ (100%)

⁷⁸As

Mass

77.921828 u

Abundance

—

Half-life

90.7 m

Spin/Parity

2-

Decay Mode(s)

β⁻ (100%)

⁷⁹As

Mass

78.920948 u

Abundance

—

Half-life

9.01 m

Spin/Parity

3/2-

Decay Mode(s)

β⁻ (100%)

⁸⁰As

Mass

79.922474 u

Abundance

—

Half-life

15.2 seconds

Spin/Parity

1+

Decay Mode(s)

β⁻ (100%)

⁸¹As

Mass

80.922132 u

Abundance

—

Half-life

33.3 seconds

Spin/Parity

3/2-

Decay Mode(s)

β⁻ (100%)

⁸²As

Mass

81.924739 u

Abundance

—

Half-life

19.1 seconds

Spin/Parity

(2-)

Decay Mode(s)

β⁻ (100%)

⁸³As

Mass

82.925207 u

Abundance

—

Half-life

13.4 seconds

Spin/Parity

(5/2-)

Decay Mode(s)

β⁻ (100%)

⁸⁴As

Mass

83.929303 u

Abundance

—

Half-life

4.2 seconds

Spin/Parity

(3-)

Decay Mode(s)

β⁻ (100%), β⁻n (0.18%)

⁸⁵As

Mass

84.932164 u

Abundance

—

Half-life

2.021 seconds

Spin/Parity

(3/2-)

Decay Mode(s)

β⁻ (100%), β⁻n (62.9%)

⁸⁶As

Mass

85.936702 u

Abundance

—

Half-life

0.945 seconds

Spin/Parity

—

Decay Mode(s)

β⁻ (100%), β⁻n (35.5%)

⁸⁷As

Mass

86.940292 u

Abundance

—

Half-life

484 milliseconds

Spin/Parity

(3/2-)

Decay Mode(s)

β⁻ (100%), β⁻n (15.4%)

⁸⁸As

Mass

87.945840 u

Abundance

—

Half-life

0.20 seconds

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

⁸⁹As

Mass

88.950048 u

Abundance

—

Half-life

Unknown

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

⁹⁰As

Mass

89.955995 u

Abundance

—

Half-life

Unknown

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

⁹¹As

Mass

90.960816 u

Abundance

—

Half-life

Unknown

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

⁹²As

Mass

91.967386 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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N

Sy

Name

Atomic Mass

Series

Metals

Nonmetals