Element 34 - Selenium / Selenium

(Latin / English)

Mass Number

Atomic Mass

% Abundance

Nuclear Spin

74

73.9225

0.9

0

75 *

74.9225

0

5/2+

76

75.9192

9.2

0

77

76.9199

7.6

1/2-

78

77.9173

23.7

0

80

79.9165

49.8

0

82

81.9167

8.8

0

(* = unstable isotope)

Mass Number	Atomic Mass	% Abundance	Nuclear Spin
74	73.9225	0.9	0
75 *	74.9225	0	5/2+
76	75.9192	9.2	0
77	76.9199	7.6	1/2-
78	77.9173	23.7	0
80	79.9165	49.8	0
82	81.9167	8.8	0

Electron Configuration:

[Ar] 3d¹⁰ 4s² 4p⁴

Relative Atomic Mass:

78.96

State (25°C, 1 atm):

solid, non-metal

Density:

4790 kg/m³

Melting Temperature:

490 K

Boiling Temperature:

958.1 K

Electron Configuration:	[Ar] 3d¹⁰ 4s² 4p⁴
Relative Atomic Mass:	78.96
State (25°C, 1 atm):	solid, non-metal
Density:	4790 kg/m³
Melting Temperature:	490 K
Boiling Temperature:	958.1 K