bromine in a test tube

Br - Bromine

The liquid halogen bromine was extracted from seawater in 1826 by Antoine Jèrôme Balard. The solubility of potassium bromide is investigated in CHM 130. Bromine - acetic acid reagent is used for organic synthesis in CHM 230 and 235. Brominated hydrocarbons are used as qualitative unknowns in CHM 154 and 236.

Atomic number - 35 Density g/mL 3 .12
Atomic weight u 79 .904 Melting point K 265 .9
Bonding radius A 1 .14 Boiling point K 332 .25
Atomic radius A 1 .12 Heat of vaporization kJ/mol 15 .438
Ionization Potential V 11 .814 Heat of fusion kJ/mol 5 .286
Electronegativity - 2 .96 Specific heat J/gK 0 .473
The oxide is a strong acid.
Crystal are orthorhombic.

Electron config. : [Ar] 3d10 4s2 4p5

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
H He
Li Be B C N O F Ne
Na Mg Al Si P S Cl Ar
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
Cs Ba La* Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
Fr Ra Ac** Rf Db Sg Bh Hs Mt 110 111 112 113
Lanthanides* Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
Actinides ** Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

Isotopes of Br: Click mass number for decay process, product for element page.
069
100 nsec
p,3.390 MeV
Se-68
68.949865 		070
79.1 msec
EC,10.400 MeV
Se-70
69.944605 		070a
2.2 sec
EC,10.400 MeV
Se-70
69.944605 		071
21.4 sec
EC,6.500 MeV
Se-71
70.939237 		072
78.6 sec
EC,8.700 MeV
Se-72
71.936446 		073
3.4 min
EC,4.660 MeV
Se-73
72.931765 		074
25.4 min
EC,6.907 MeV
Se-74
73.929891
075
96.7 min
EC,3.030 MeV
Se-75
74.925776 		076
16.2 hr
EC,4.963 MeV
Se-76
75.924542 		076a
1.31 sec
EC,5.066 MeV
Se-76
75.924652 		077
57.036 hr
EC,1.365 MeV
Se-77
76.921380 		078
6.46 min
B-/EC,3.574
Kr-78/Se-78
77.921146 		079 50.69%

Stable

78.918337 		080
17.68 min
B-/EC,2.004
Kr-80/Se-80
79.918530
081 49.31%

Stable

80.916291 		082
35.30 hr
B-,3.093 MeV
Kr-82
81.916804 		083
2.40 hr
B-,3.896 MeV
Kr-83
82.915181 		084
31.80 min
B-,4.650 MeV
Kr-84
83.916499 		085
2.90 min
B-,2.870 MeV
Kr-85
84.915610 		086
55.1 sec
B-,7.626 MeV
Kr-86
85.918802 		087
55.60 sec
B-/B-n,6.853
Kr-87/Kr-86
86.920715
088
16.34 sec
B-/B-n,8.960
Kr-88/Kr-87
87.924068 		089
4.40 sec
B-/B-n,8.160
Kr-89/Kr-88
88.926397 		090
1.92 sec
B-/B-n,10.350
Kr-90/Kr-89
89.930638 		091
0.541 sec
B-/B-n,9.800
Kr-91/Kr-90
90.933923 		092
0.343 sec
B-/B-n,12.200
Kr-92/Kr-91
91.939215 		093
102 msec
B-/B-n,11.000
Kr-93/Kr-92
92.943102 		094
70 msec
B-/B-n,2.680
Kr-94/Kr-93
93.947585
MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass

Updated by clh on 2/6/98. This is not a publication of Phoenix College.