Astatine

Z 85 210.0 g/molMetalloid Radioactive

Overview Atomic Properties Thermodynamics Electromagnetism Isotopes


¹⁹¹At	106	191.0041	3,864.0	---	2.1 ms	1/2+	α¹⁸⁷Bi(100%) β⁺¹⁹¹Po	2003
^191mAt	106	191.0042	3,922.0	---	2.2 ms	(7/2-)	α¹⁸⁷Bi(100%) β⁺¹⁹¹Po	2003
¹⁹²At	107	192.0031	2,926.0	---	11.5 ms	(3+)	α¹⁸⁸Bi(~100%) β⁺SF(<0.51%) β⁺¹⁹²Po	2006
^192mAt	107	192.0031	2,926.0	---	88.0 ms	(9-)	α¹⁸⁸Bi(~100%) β⁺SF(<0.51%) β⁺¹⁹²Po	2006
¹⁹³At	108	192.9999	-67.0	---	29.0 ms	1/2+	α¹⁸⁹Bi(100%)	2003
^193mAt	108	192.9999	-59.0	---	21.0 ms	7/2-	α¹⁸⁹Bi(100%)	1995
¹⁹³ⁿAt	108	193.0	-25.0	---	28.0 ms	13/2+	γ¹⁹³At(76%) α¹⁸⁹Bi(24%)	2003
¹⁹⁴At	109	193.9992	-716.0	---	286.0 ms	(5-)	α¹⁹⁰Bi(100%) β⁺¹⁹⁴Po(8.268%) β⁺SF(0.032%)	2009
^194mAt	109	193.9992	-740.0	---	323.0 ms	10-	α¹⁹⁰Bi(100%) β⁺¹⁹⁴Po(8.268%) β⁺SF(0.032%)	1984
¹⁹⁵At	110	194.9963	-3,470.0	---	290.0 ms	1/2+	α¹⁹¹Bi(100%) β⁺¹⁹⁵Po	1999
^195mAt	110	194.9963	-3,441.0	---	143.0 ms	7/2-	α¹⁹¹Bi(88%) γ¹⁹⁵At(12%) β⁺¹⁹⁵Po	1995
¹⁹⁶At	111	195.9958	-3,910.0	---	377.0 ms	(3+)	α¹⁹²Bi(97.5%) β⁺SF(0.009%) β⁺¹⁹⁶Po	1967
^196mAt	111	195.9958	-3,950.0	---	20.0 ms	(10-)	α¹⁹²Bi(100%)	1996
¹⁹⁶ⁿAt	111	195.996	-3,750.0	---	11.0 µs	(5+)	γ¹⁹⁶At(100%)	2000
¹⁹⁷At	112	196.9932	-6,355.0	---	388.2 ms	9/2-	α¹⁹³Bi(96.1%) β⁺¹⁹⁷Po(3.9%)	1967
^197mAt	112	196.9932	-6,311.0	---	2.0 s	1/2+	α¹⁹³Bi(~100%) γ¹⁹⁷At(<0.004%) β⁺¹⁹⁷Po	1985
¹⁹⁷ⁿAt	112	196.9935	-6,044.0	---	1.3 µs	13/2+	γ¹⁹⁷At(100%)	1999
¹⁹⁸At	113	197.9928	-6,709.0	---	4.47 s	3+	α¹⁹⁴Bi(97%) β⁺¹⁹⁸Po	1967
^198mAt	113	197.9931	-6,442.0	---	1.23 s	10-	α¹⁹⁴Bi(93%) β⁺¹⁹⁸Po	1967
¹⁹⁹At	114	198.9905	-8,823.0	---	7.02 s	9/2-	α¹⁹⁵Bi(89%) β⁺¹⁹⁹Po	1967
^199mAt	114	198.9908	-8,579.0	---	273.0 ms	1/2+	γ¹⁹⁹At(99%) α¹⁹⁵Bi(1%)	2013
¹⁹⁹ⁿAt	114	198.9911	-8,250.0	---	70.0 ns	13/2+	γ¹⁹⁹At(100%)	2000
²⁰⁰At	115	199.9904	-8,988.0	---	43.2 s	(3+)	α¹⁹⁶Bi(52%) β⁺²⁰⁰Po(48%)	1963
^200mAt	115	199.9905	-8,875.0	---	47.0 s	(7+)	β⁺²⁰⁰Po(57%) α¹⁹⁶Bi(43%) γ²⁰⁰At	1967
²⁰⁰ⁿAt	115	199.9907	-8,644.0	---	8.0 s	(10-)	α¹⁹⁶Bi(10.5%) γ²⁰⁰At β⁺²⁰⁰Po	1967
²⁰¹At	116	200.9884	-10,789.0	---	1.42 m	9/2-	α¹⁹⁷Bi(71%) β⁺²⁰¹Po(29%)	1963
^201mAt	116	200.9889	-10,330.0	---	45.0 ms	1/2+	γ²⁰¹At(100%)	2015
²⁰¹ⁿAt	116	200.9909	-8,469.0	---	3.39 µs	29/2+	γ²⁰¹At(100%)	2015
²⁰²At	117	201.9886	-10,595.0	---	3.07 m	3+	β⁺²⁰²Po(88%) α¹⁹⁸Bi(12%)	1961
^202mAt	117	201.9888	-10,401.0	---	3.03 m	7+	β⁺²⁰²Po(91.5%) α¹⁹⁸Bi(8.5%) γ²⁰²At	1992
²⁰²ⁿAt	117	201.9893	-10,010.0	---	460.0 ms	10-	γ²⁰²At(99.904%) α¹⁹⁸Bi(0.096%) β⁺²⁰²Po	1992
²⁰³At	118	202.9869	-12,163.0	---	7.4 m	9/2-	β⁺²⁰³Po(69%) α¹⁹⁹Bi(31%)	1951
^203mAt	118	202.9877	-11,480.0	---	3.5 ms	1/2+	γ²⁰³At(100%)	2017
²⁰³ⁿAt	118	202.9894	-9,833.0	---	9.77 µs	29/2+	γ²⁰³At(100%)	2018
²⁰⁴At	119	203.9873	-11,875.0	---	9.12 m	7+	β⁺²⁰⁴Po(96.2%) α²⁰⁰Bi(3.8%)	1961
^204mAt	119	203.9879	-11,288.0	---	108.0 ms	10-	γ²⁰⁴At(100%)	1969
²⁰⁵At	120	204.9861	-12,985.0	---	26.9 m	9/2-	β⁺²⁰⁵Po(90%) α²⁰¹Bi(10%)	1951
^205mAt	120	204.9886	-10,645.0	---	7.76 µs	29/2+	γ²⁰⁵At(100%)	1982
²⁰⁶At	121	205.9866	-12,439.0	---	30.6 m	(6+)	β⁺²⁰⁶Po(99.1%) α²⁰²Bi(0.9%)	1961
^206mAt	121	205.9875	-11,629.0	---	813.0 ns	(10-)	γ²⁰⁶At(100%)	1999
²⁰⁷At	122	206.9858	-13,227.0	---	1.81 h	9/2-	β⁺²⁰⁷Po(90%) α²⁰³Bi(10%)	1951
^207mAt	122	206.9881	-11,110.0	---	108.0 ns	25/2+	γ²⁰⁷At(100%)	1981
²⁰⁸At	123	207.9866	-12,470.0	---	1.63 h	6+	β⁺²⁰⁸Po(99.45%) α²⁰⁴Bi(0.55%)	1950
^208mAt	123	207.9891	-10,194.0	---	1.5 µs	16-	γ²⁰⁸At(100%)	1991
²⁰⁹At	124	208.9862	-12,884.0	---	5.42 h	9/2-	β⁺²⁰⁹Po(96.1%) α²⁰⁵Bi(3.9%)	1951
^209mAt	124	208.9888	-10,455.0	---	916.0 ns	29/2+	γ²⁰⁹At(100%)	1975
²¹⁰At	125	209.9871	-11,972.0	---	8.1 h	(5+)	β⁺²¹⁰Po(99.825%) α²⁰⁶Bi(0.175%)	1949
^210mAt	125	209.9899	-9,422.0	---	482.0 ns	(15-)	γ²¹⁰At(100%)	1970
²¹⁰ⁿAt	125	209.9915	-7,944.0	---	5.66 µs	(19+)	γ²¹⁰At(100%)	1975
²¹¹At	126	210.9875	-11,647.2	---	7.21 h	9/2-	EC²¹¹Po(58.2%) α²⁰⁷Bi(41.8%)	1940
^211mAt	126	210.9927	-6,832.7	---	4.23 µs	(39/2-)	γ²¹¹At(100%)	1971
²¹²At	127	211.9907	-8,628.1	---	314.0 ms	(1-)	α²⁰⁸Bi(100%) β⁺²¹²Po β⁻²¹²Rn	1954
^212mAt	127	211.991	-8,405.2	---	119.0 ms	(9-)	α²⁰⁸Bi(100%) γ²¹²At	1970
²¹²ⁿAt	127	211.9959	-3,856.7	---	152.0 µs	(25-)	γ²¹²At(100%)	1998
²¹³At	128	212.9929	-6,580.0	---	125.0 ns	9/2-	α²⁰⁹Bi(100%)	1968
^213mAt	128	212.9944	-5,222.0	---	110.0 ns	(25/2-)	γ²¹³At(100%)	1980
²¹³ⁿAt	128	212.9962	-3,582.0	---	45.0 µs	(49/2+)	γ²¹³At(100%)	2003
²¹⁴At	129	213.9964	-3,379.0	---	558.0 ns	1-	α²¹⁰Bi(100%)	1949
^214mAt	129	213.9964	-3,321.0	---	265.0 ns	---	α²¹⁰Bi(100%) γ²¹⁴At	1982
²¹⁴ⁿAt	129	213.9966	-3,147.0	---	760.0 ns	9-	α²¹⁰Bi(100%) γ²¹⁴At	1982
²¹⁵At	130	214.9987	-1,257.0	---	37.0 µs	9/2-	α²¹¹Bi(100%)	1944
²¹⁶At	131	216.0024	2,257.0	---	300.0 µs	1-	α²¹²Bi(100%) β⁻²¹⁶Rn EC²¹⁶Po	1948
^216mAt	131	216.0026	2,417.0	---	100.0 µs	(9-)	α²¹²Bi(100%)	1971
²¹⁷At	132	217.0047	4,395.0	---	32.6 ms	9/2-	α²¹³Bi(99.992%) β⁻²¹⁷Rn(0.008%)	1947
²¹⁸At	133	218.0087	8,100.0	---	1.28 s	(2-)	α²¹⁴Bi(100%) β⁻²¹⁸Rn	1943
²¹⁹At	134	219.0112	10,396.0	---	56.0 s	(9/2-)	α²¹⁵Bi(93.6%) β⁻²¹⁹Rn(6.4%)	1953
²²⁰At	135	220.0154	14,376.0	---	3.71 m	(3-)	β⁻²²⁰Rn(92%) α²¹⁶Bi(8%)	1989
²²¹At	136	221.018	16,783.0	---	2.3 m	(3/2-)	β⁻²²¹Rn(100%)	1989
²²²At	137	222.0225	20,953.0	---	54.0 s	---	β⁻²²²Rn(100%)	1989
²²³At	138	223.0252	23,428.0	---	50.0 s	(3/2-)	β⁻²²³Rn(100%) α²¹⁹Bi	1989
²²⁴At	139	224.0297	27,711.0	---	2.5 m	(2+)	β⁻²²⁴Rn(100%)	2010
²²⁵At	140	225.0325	30,300.0	---	3.0 s	(1/2+)	β⁻²²⁵Rn β⁻n²²⁴Rn	2010
²²⁶At	141	226.0372	34,660.0	---	7.0 m	(2+)	β⁻²²⁶Rn β⁻n²²⁵Rn	2010
²²⁷At	142	227.0402	37,430.0	---	5.0 s	(1/2+)	β⁻²²⁷Rn β⁻n²²⁶Rn	2010
²²⁸At	143	228.045	41,880.0	---	1.0 m	(3+)	β⁻²²⁸Rn β⁻n²²⁷Rn	2010
²²⁹At	144	229.0482	44,890.0	---	1.0 s	(1/2+)	β⁻²²⁹Rn β⁻n²²⁸Rn	2010

84Po

86Rn