Xe Xenon Index

Xenon (Xe) Element Properties

Atomic Mass	131.29
Atomic Number	54
Name Origins	Greek, xenos = "stranger."
Year Discovered	1898
Discovery Credits	Sir William Ramsay and M. W. Travers at London, UK.
Remarks	Colorless, odorless gas obtained from liquid air. Inert toward most other chemicals but reacts with fluorine gas to form xenon fluorides. Oxides, acids and salt known. Little used outside research. Used to fill the bulbs of zenon flashlights.
References	Emsley, J., 1991; THE ELEMENTS : Sec. Ed., Clarendon Press, Oxford, 251 p.
See Also	WebElements, ChemiCool

**Naturally Occurring Isotopes**
Symbol	Isotope Mass	Isotope Nuclide Number	Isotope Number	Natural Abundance	Half-life	Half-life Units	Decay Mode	Decay Mode MeV	Decay Mode %
Xe	123.905894	124	54	0.1000%		Stable
Xe	125.904281	126	54	0.0900%		Stable
Xe	126.905182	127	54	00.0000%	36.3	Days	EC	0.66	100.00%
Xe	127.903531	128	54	1.9100%		Stable
Xe	128.90478	129	54	26.4000%		Stable
Xe	129.903509	130	54	4.1000%		Stable
Xe	130.905072	131	54	21.2000%		Stable
Xe	131.904144	132	54	26.9000%		Stable

Group	1	2		3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
Period
1	1 H																		2 He
2	3 Li	4 Be												5 B	6 C	7 N	8 O	9 F	10 Ne
3	11 Na	12 Mg												13 Al	14 Si	15 P	16 S	17 Cl	18 Ar
4	19 K	20 Ca		21 Sc	22 Ti	23 V	24 Cr	25 Mn	26 Fe	27 Co	28 Ni	29 Cu	30 Zn	31 Ga	32 Ge	33 As	34 Se	35 Br	36 Kr
5	37 Rb	38 Sr		39 Y	40 Zr	41 Nb	42 Mo	43 Tc	44 Ru	45 Rh	46 Pd	47 Ag	48 Cd	49 In	50 Sn	51 Sb	52 Te	53 I	54 Xe
6	55 Cs	56 Ba	*	71 Lu	72 Hf	73 Ta	74 W	75 Re	76 Os	77 Ir	78 Pt	79 Au	80 Hg	81 Tl	82 Pb	83 Bi	84 Po	85 At	86 Rn
7	87 Fr	88 Ra	**	103 Lr	104 Rf	105 Db	106 Sg	107 Bh	108 Hs	109 Mt	110 Ds
-
*Lanthanides			*	57 La	58 Ce	59 Pr	60 Nd	61 Pm	62 Sm	63 Eu	64 Gd	65 Tb	66 Dy	67 Ho	68 Er	69 Tm	70 Yb
**Actinides			**	89 Ac	90 Th	91 Pa	92 U	93 Np	94 Pu	95 Am	96 Cm	97 Bk	98 Cf	99 Es	100 Fm	101 Md	102 No