No

Nobelium

Z 102 261.0 g/molActinide Radioactive

Overview Atomic Properties Thermodynamics Electromagnetism Isotopes


²⁴⁸No	146	248.0866	80,690.0	---	---	0+	SF	2003
²⁴⁹No	147	249.0878	81,790.0	---	57.0 µs	(5/2+)	β⁺²⁴⁹Md α²⁴⁵Fm	2003
²⁵⁰No	148	250.0876	81,570.0	---	5.08 µs	0+	SF(100%) α²⁴⁶Fm β⁺²⁵⁰Md	2003
^250mNo	148	250.0887	82,620.0	---	36.3 µs	(6+)	SF(100%) γ²⁵⁰No α²⁴⁶Fm	2001
²⁵¹No	149	251.0889	82,850.0	---	800.0 ms	(7/2+)	α²⁴⁷Fm(83%) SF(<0.3%) β⁺²⁵¹Md	1967
^251mNo	149	251.0891	82,960.0	---	1.02 s	(1/2+)	α²⁴⁷Fm(100%)	1997
²⁵¹ⁿNo	149	251.0902	83,980.0	---	---	(17/2-)	γ²⁵¹No	2006
²⁵²No	150	252.089	82,871.0	---	2.47 s	0+	α²⁴⁸Fm(67.6%) SF(31.3%) β⁺²⁵²Md(1.1%)	1967
^252mNo	150	252.0903	84,125.0	---	109.1 ms	(8-)	γ²⁵²No(100%)	2007
²⁵³No	151	253.0906	84,359.0	---	1.57 m	9/2-	α²⁴⁹Fm(55%) β⁺²⁵³Md SF	1967
^253mNo	151	253.0907	84,527.0	---	30.3 µs	5/2+	α²⁴⁹Fm(100%)	1973
²⁵³ⁿNo	151	253.0919	85,560.0	---	706.0 µs	(19/2+)	γ²⁵³No(100%)	2011
²⁵⁴No	152	254.091	84,723.0	---	51.2 s	0+	α²⁵⁰Fm(90%) β⁺²⁵⁴Md(10%) SF(0.17%)	1966
^254mNo	152	254.0923	86,019.0	---	264.9 ms	(8-)	γ²⁵⁴No(~100%) SF(0.02%) α²⁵⁰Fm(<0.01%)	1973
²⁵⁴ⁿNo	152	254.0944	87,940.0	---	184.0 µs	(16+)	γ²⁵⁴No(~100%) SF(<0.012%)	2006
²⁵⁵No	153	255.0932	86,812.0	---	3.52 m	(1/2+)	β⁺²⁵⁵Md(70%) α²⁵¹Fm(30%)	1967
^255mNo	153	255.0934	87,020.0	---	1.0 s	(11/2-)	γ²⁵⁵No α²⁵¹Fm	---
²⁵⁶No	154	256.0943	87,823.0	---	2.91 s	0+	α²⁵²Fm(99.45%) SF(0.55%) EC²⁵⁶Md	1963
²⁵⁷No	155	257.0969	90,247.0	---	24.5 s	(3/2+)	α²⁵³Fm(85%) β⁺²⁵⁷Md(15%) SF	1967
²⁵⁸No	156	258.0982	91,480.0	---	1.23 ms	0+	SF(100%) α²⁵⁴Fm	1989
²⁵⁹No	157	259.101	94,079.0	---	58.0 m	9/2+	α²⁵⁵Fm(75%) EC²⁵⁹Md(25%) SF(<10%)	1973
²⁶⁰No	158	260.1026	95,610.0	---	106.0 ms	0+	SF(100%)	1985
²⁶¹No	159	261.1057	98,460.0	---	3.0 h	---	α²⁵⁷Fm	---
²⁶²No	160	262.1075	100,100.0	---	---	0+	SF(100%) α²⁵⁸Fm	1988
²⁶³No	161	263.1107	103,130.0	---	20.0 m	---	α²⁵⁹Fm SF	---
²⁶⁴No	162	264.1127	105,010.0	---	1.0 m	0+	α²⁶⁰Fm SF	---