Element Xenon

Xenon ElementIt is a chemical element with the symbol Xe and atomic number 54.
It is a colorless, dense, odorless noble gas found in Earth’s atmosphere in trace amounts.
Although generally unreactive, Element Xenon can undergo a few chemical reactions such as the formation of xenon hexafluoroplatinate, the first noble gas compound to be synthesized
Xenon is used in flash lamps and arc lamps, and as a general anesthetic. The first excimer laser design used a xenon dimer molecule (Xe2) as the lasing medium,and the earliest laser designs used xenon flash lamps as pumps. Xenon is used to search for hypothetical weakly interacting massive particles and as the propellant for ion thrusters in spacecraft.

Names and Identifiers

Chemical Formula:Xe
Molecular Weight:131.29300g/mol
EC Number :n/a
MDL Number:MFCD00083855
Other Names:Xeno
PubChem CID:23991
IUPAC Name:Xenon
Canonical SMILES:[Xe]
ICSC Number:0609

Physical & Chemical Properties

Density:5.894 g/L
Boiling Point:165.051 K ​(−108.099 °C, ​−162.578 °F)
Melting Point:161.40 K ​(−111.75 °C, ​−169.15 °F)
Molecular Formula:Xe
Flash Point:n/a
Exact Mass:131.90400
Symbol:Globally Harmonized System of Classification
Signal Word:Warning
Hazard Statements:H280
Precautionary Statements:P410 + P403
Hazard Codes:T
Risk Phrases:n/a
Safety Phrases:S9-S38
RIDADR:UN 2036 2.2
WGK Germany:3
Packaging Group:n/a
Hazard Class:2.2

Of the nine stable Xenon isotopes, several are used in various medical and scientific applications. Xe-124 is used in the production of two radioisotopes: I-123 and I-125. I-123 is used extensively in diagnostic procedures while I-125 is used in the treatment of prostate cancer. Hyperpolarized Xe-129 is used in the magnetic resonance imaging of gas flows in the lungs. Xe-136 has been proposed as a detector for neutrinoless double Beta decay research. Xe-126 can be used as a target for the production of radioactive Ba-128.

Naturally occurring isotopes

IsotopeMass/DaNatural abundance (atom %)Nuclear spin (I)Magnetic moment (μ/μN)
124Xe123.9058942 (22)0.09 (1)0
126Xe125.904281 (8)0.09 (1)0
128Xe127.9035312 (17)1.92 (3)0
129Xe128.9047801 (21)26.44 (24)1/2-0.777977
130Xe129.9035094 (17)4.08 (2)0
131Xe130.905072 (5)21.18 (3)3/20.691861
132Xe131.904144 (5)26.89 (6)0
134Xe133.905395 (8)10.44 (10)0
136Xe135.907214 (8)8.87 (16)0

Radiosotope data

IsotopeMass/DaHalf-lifeMode of decayNuclear spinNuclear magnetic moment
122Xe121.908620.1 hEC to 122I0
123Xe122.908482.00 hEC to 123I1/2
125Xe124.90639817.1 hEC to 125I1/2
127Xe126.90517936.4 dEC to 127I1/2-0.504
133Xe132.9059065.243 dβ to 133Cs3/20.813
135Xe134.907219.10 hβ to 135Cs3/20.903

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