Xe - Xenon

Xenon from Greek's word for stranger, is a rare gas that was extracted from the atmosphere (along with neon, krypton and radon.) by William Ramsey and M. W. Travers in 1898. Xenon is not an inert element - a hydrate, oxide and several fluorides have been prepared. The emission spectrum of xenon may be demonstrated to our general chemistry students.

Atomic number - 54 Density g/mL 5 .89
Atomic weight u 131 .3 Melting point K 161 .36
Bonding radius A 1 .31 Boiling point K 165 .03
Atomic radius A 1 .24 Heat of vaporization kJ/mol 12 .636
Ionization Potential V 12 .13 Heat of fusion kJ/mol 2 .297
Electronegativity - - Specific heat J/gK 0 .158
The oxide is a weak acid.
Crystal are face centered cubic.

Electron config. : [Kr] 4d10 5s2 5p6

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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 Xe: Click mass number for decay process, product for element page.
110

a,3.886 MeV
Te-106
109.94449 		111
0.74 sec
a/EC,3.720
Te-107/I-111
110.94159 		112
2.7 sec
a/EC,7.200
Te-108/I-112
111.93566 		113
2.74 sec
a/EC/ECp,9.060
Te-109/I-113/Te-112
112.93337 		114
10.0 sec
EC,5.900 MeV
I-114
113.92814 		115
18 sec
EC/ECp,8.000
I-115/Te-114
114.92652 		116
59 sec
EC,4.660 MeV
I-116
115.92172
117
61 sec
EC/ECp,6.440
I-117/Te-116
116.92056 		118
3.8 min
EC,2.900 MeV
I-118
117.91658 		119
5.8 min
EC,5.000 MeV
I-119
118.91555 		120
40 min
EC,1.960 MeV
I-120
119.91216 		121
40.1 min
EC,3.730 MeV
I-121
120.91137 		122
20.1 hr
EC,4.234 MeV
I-122
121.90856 		123
2.08 hr
EC,2.676 MeV
I-123
122.90847
124 0.10%

Stable

123.90589 		125
16.9 hr
EC,1.652 MeV
I-125
124.90639 		126 0.09%

Stable

125.90426 		127
36.4 da
EC,1.581 MeV
I-127
126.90517 		128 1.91%

Stable

127.90353 		129 26.4%

Stable

128.90477 		130 4.1%

Stable

129.90350
131 21.2%

Stable

130.90508 		132 26.9%

Stable

131.90415 		133
5.243 da
B-,1.634 MeV
Cs-133
132.90590 		134 10.4%

Stable

133.90539 		135
9.14 hr
B-,1.151 MeV
Cs-135
134.90720 		136 8.9%
9.3E+19 yr
2B-,7.570 MeV
Ba-136
135.90722 		137
3.818 min
B-,4.172 MeV
Cs-137
136.91156
138
14.08 min
B-,2.770 MeV
Cs-138
137.91398 		139
39.68 sec
B-,5.057 MeV
Cs-139
138.91878 		140
13.60 sec
B-,4.060 MeV
Cs-140
139.92163 		141
1.73 sec
B-/B-n,6.150
Cs-141/Cs-140
140.92665 		142
1.24 sec
B-/B-n,5.040
Cs-142/Cs-141
141.92970 		143
0.30 sec
B-,7.310 MeV
Cs-143
142.93515 		144
1.15 sec
B-,6.100 MeV
Cs-144
143.93848
145
0.9 sec
B-/B-n,6.100
Cs-145/Cs-144
145.0 		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.