Si

Silicon

Z 14 28.085 g/molMetalloid

Overview Atomic Properties Thermodynamics Electromagnetism Isotopes


²⁸Si	14	27.9769	-21,492.797	92.2545%	Stable	0+	---	1920
²⁹Si	15	28.9765	-21,895.081	4.672%	Stable	1/2+	---	1920
³⁰Si	16	29.9738	-24,432.962	3.0735%	Stable	0+	---	1924
²²Si	8	22.0361	33,640.0	---	28.7 ms	0+	β⁺p²¹Mg(62%) β⁺²²Al(37.3%) β⁺p²⁰Na(0.7%)	1987
²³Si	9	23.0257	23,950.0	---	42.3 ms	(3/2+)	β⁺p²²Mg(88%) β⁺²³Al(8.4%) β⁺p²¹Na(3.6%)	1986
²⁴Si	10	24.0115	10,745.0	---	143.2 ms	0+	β⁺²⁴Al(65.5%) β⁺p²³Mg(34.5%)	1979
²⁵Si	11	25.0041	3,827.0	---	220.6 ms	5/2+	β⁺²⁵Al(65%) β⁺p²⁴Mg(35%)	1963
²⁶Si	12	25.9923	-7,141.0	---	2.25 s	0+	β⁺²⁶Al(100%)	1960
²⁷Si	13	26.9867	-12,384.51	---	4.12 s	5/2+	β⁺²⁷Al(100%)	1939
³¹Si	17	30.9754	-22,949.04	---	2.62 h	3/2+	β⁻³¹P(100%)	1934
³²Si	18	31.9742	-24,077.69	---	157.0 y	0+	β⁻³²P(100%)	1953
³³Si	19	32.978	-20,514.3	---	6.18 s	3/2+	β⁻³³P(100%)	1971
³⁴Si	20	33.9785	-19,991.7	---	2.77 s	0+	β⁻³⁴P(100%)	1971
^34mSi	20	33.9831	-15,735.6	---	---	(3-)	γ³⁴Si(100%)	1989
³⁵Si	21	34.9846	-14,390.0	---	780.0 ms	(7/2-)	β⁻³⁵P(100%) β⁻n³⁴P(<5%)	1971
³⁶Si	22	35.9866	-12,440.0	---	503.0 ms	0+	β⁻³⁶P(88%) β⁻n³⁵P(12%)	1971
³⁷Si	23	36.9929	-6,570.0	---	141.0 ms	(5/2-)	β⁻³⁷P(83%) β⁻n³⁶P(17%) β⁻n³⁵P	1979
³⁸Si	24	37.9955	-4,170.0	---	63.0 ms	0+	β⁻³⁸P(75%) β⁻n³⁷P(25%)	1979
³⁹Si	25	39.0025	2,320.0	---	41.2 ms	(5/2-)	β⁻³⁹P(67%) β⁻n³⁸P(33%) β⁻n³⁷P	1979
⁴⁰Si	26	40.0061	5,670.0	---	31.2 ms	0+	β⁻⁴⁰P(62%) β⁻n³⁹P(38%) β⁻n³⁸P	1989
⁴¹Si	27	41.0142	13,200.0	---	20.0 ms	(7/2-)	β⁻⁴¹P(100%) β⁻n⁴⁰P(>55%) β⁻n³⁹P	1989
⁴²Si	28	42.0181	16,840.0	---	12.5 ms	0+	β⁻⁴²P(100%) β⁻n⁴¹P β⁻n⁴⁰P	1990
⁴³Si	29	43.0261	24,330.0	---	30.0 ms	(3/2-)	β⁻⁴³P β⁻n⁴²P β⁻n⁴¹P	2002
⁴⁴Si	30	44.0315	29,310.0	---	4.0 ms	0+	β⁻⁴⁴P β⁻n⁴³P β⁻n⁴²P	2007
⁴⁵Si	31	45.0398	37,090.0	---	4.0 ms	(3/2-)	β⁻⁴⁵P β⁻n⁴⁴P β⁻n⁴³P	---