AMERICIUM, Am (95)

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ATOMIC ARCHITECTURE

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Elemental Tile

Americium

···

OVERVIEW

AMERICIUM

Am (95)

ˌæməˈrɪsiəm

PHONETICS

IDENTIFICATION

Americium is a relatively soft radioactive metal with silvery appearance. Several oxidation states are known, which range from +2 to +7 and can be identified by their characteristic optical absorption spectra. The crystal lattice of solid americium and its compounds contains small intrinsic radiogenic defects, which are induced by self-irradiation with alpha particles and accumulate with time.

ELEMENT BRIEF

1944 by Glenn T. Seaborg, Ralph A. James, Leon O. Morgan and Albert Ghiorso, USA.

DISCOVERY

From the name America.

ETYMOLOGY

Americium

ELEMENT

Am

SYMBOL

95

ATOMIC NUMBER

7440-35-9

CAS NUMBER

PHYSICAL

element

ELEMENTAL SPECTRUM

Silver

ELEMENTAL COLOUR

-

REFRACTIVE INDEX

-

POISSON RATIO

20.172 cm³

MOLAR VOLUME

-

BRINELL HARDNESS

-

MOHS HARDNESS

-

VICKERS HARDNESS

-

SPEED OF SOUND

-

BULK MODULUS

-

SHEAR MODULUS

-

YOUNG MODULUS

ALLOTROPES

element

element

element

element

THERMODYNAMIC

1,449.15 K, 1,176.00 °C

MELTING POINT

2,284.15 K, 2,011.00 °C

BOILING POINT

-

AUTOMATIC IGNITION

-

FLASHPOINT

-

CRITICAL TEMPERATURE

-

CRITICAL PRESSURE

10.000'000 W/(m K)

THERMAL CONDUCTIVITY

-

THERMAL EXPANSION

-

SPECIFIC HEAT

-

HEAT FUSION

-

HEAT VAPORISATION

-

HEAT COMBUSTION

-

CURIE POINT

-

NEEL POINT

-

ADIABATIC INDEX

Solid

PHASE

ELECTROMAGNETIC

-

ELECTRICAL TYPE

-

CONDUCTIVITY

-

RESISTIVITY

0.600 K

SUPERCONDUCTING POINT

-

MAGNETIC TYPE

0.000'000'051'5

MASS SUSCEPTIBILITY

0.000'000'012'510'00

MOLAR SUSCEPTIBILITY

-

VOLUME SUSCEPTIBILITY

STRUCTURE

Actinide

CLASSIFICATION

242.059'105'3

ATOMIC WEIGHT

140 pm

ATOMIC RADIUS

166 pm

COVALENT RADIUS SINGLE BOND

135 pm

COVALENT RADIUS DOUBLE BOND

-

COVALENT RADIUS TRIPLE BOND

244 pm

VAN DER WAALS RADIUS

[Rn]7s²5f⁷

ELECTRON CONFIGURATION

Hexagonal, Close Packed Double

CRYSTAL STRUCTURE

12.000'00 g/cm³

DENSITY AS SOLID

-

DENSITY AS LIQUID

-

DENSITY AS GAS

p6₃/mmc

SPACE GROUP NAME

194

SPACE GROUP NUMBER

π/2, π/2 2π/3

LATTICE ANGLES

346.81, 346.81 1124.1 pm

LATTICE CONSTANTS

REACTIVITY

4

VALENCE

1.3

ELECTRONEGATIVITY

-

ELECTRON AFFINITY

IONISATION ENERGY

element

ELEMENTAL DISTRIBUTION

-

UNIVERSE

-

METEORITES

-

SUN

-

EARTH CRUST

-

OCEANS

-

HUMANS

ISOTOPES

7,388 Years

HALF LIFE

10,654 years

LIFETIME

6d⁷ = 5, 3, +3, +1/2

QUANTUM NUMBERS

9.000'00 b σ_s

NEUTRON CROSS SECTION

75.300'00 b σ_a

NEUTRON MASS ABSORPTION

STABLE ISOTOPES

NONE

UNSTABLE ISOTOPES

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ISOTOPIC CHAIN

Isotope	Stability	Symbol	Type	Protons		Neutrons		Spin	Parity	Mass		Abundance		Mass Measure	Mass Excess		Binding Energy		Dipole Moment		Quadrupole Moment		Halflife in Years		Halflife in Seconds		A01 Decay Probability		A01 Decay Mode	A01 Decay Energy		A01 Decay Daughter	A01 Decay Link	A02 Decay Probability		A02 Decay Mode	A02 Decay Energy		A02 Decay Daughter	A02 Decay Link	A03 Decay Probability		A03 Decay Mode	A03 Decay Energy		A03 Decay Daughter	A03 Decay Link	A04 Decay Probability		A04 Decay Mode	A04 Decay Energy		A04 Decay Daughter	A04 Decay Link	A05 Decay Probability		A05 Decay Mode	A05 Decay Energy		A05 Decay Daughter	A05 Decay Link	A06 Decay Probability		A06 Decay Mode	A06 Decay Energy		A06 Decay Daughter	A06 Decay Link	Y01 Decay Product Yield		Y01 Decay Product Nuclide	Y02 Decay Product Yield		Y02 Decay Product Nuclide	Y03 Decay Product Yield		Y03 Decay Product Nuclide	Y04 Decay Product Yield		Y04 Decay Product Nuclide	Y05 Decay Product Yield		Y05 Decay Product Nuclide	Y06 Decay Product Yield		Y06 Decay Product Nuclide	Y07 Decay Product Yield		Y07 Decay Product Nuclide	Y08 Decay Product Yield		Y08 Decay Product Nuclide	Y09 Decay Product Yield		Y09 Decay Product Nuclide	Y10 Decay Product Yield		Y10 Decay Product Nuclide	Y11 Decay Product Yield		Y11 Decay Product Nuclide	Y12 Decay Product Yield		Y12 Decay Product Nuclide
Isotope_095_am_231_u	Unstable	²³¹Am	Boson	95	p	136	n	?	0	231.045'560'000'0	u	~ 0	%	~ 0	68.996'000'000'0	MeV	7.494'000'000'0	MeV	-		-		9.51E-7	year	30.000	seconds ( x⁰ )	?	%	β+	3,131.000	keV	²³¹Pu	²³¹Am > [ ? % , β+ , 3,131.0 keV ] > ²³¹Pu			α	7,452.000	keV	²²⁷Np	²³¹Am > [ , α , 7,452.0 keV ] > ²²⁷Np																													?	%	²⁰⁵Tl	?	%	²⁰⁸Pb	?	%	²⁰⁷Pb	0.000'000	%	²⁰⁸Pb
Isotope_095_am_232_u	Unstable	²³²Am	Fermion	95	p	137	n	?	0	232.046'590'000'0	u	~ 0	%	~ 0	42.439'000'000'0	MeV	7.566'000'000'0	MeV	-		-		2.49E-6	year	78.600	seconds ( x⁰ )	2.000'000	%	α	7,272.000	keV	²²⁸Np	²³²Am > [ 2 % , α , 7,272.0 keV ] > ²²⁸Np			β+SF	?	keV	V	²³²Am > [ , β+SF , ? keV ] > V																													2.001'066	%	²⁰⁸Pb	0.000'000	%	²⁰⁶Pb	?	%	²⁰⁰Hg
Isotope_095_am_233_u	Unstable	²³³Am	Boson	95	p	138	n	?	0	233.046'348'000'0	u	~ 0	%	~ 0	43.398'000'000'0	MeV	7.564'000'000'0	MeV	-		-		6.02E-6	year	190.020	seconds ( x⁰ )	97.000'000	%	β+	2,099.000	keV	²³³Pu	²³³Am > [ 97 % , β+ , 2,099.0 keV ] > ²³³Pu			α	6,969.000	keV	²²⁹Np	²³³Am > [ , α , 6,969.0 keV ] > ²²⁹Np																													100.136'168	%	²⁰⁵Tl	0.000'000	%	²⁰⁷Pb
Isotope_095_am_234_u	Unstable	²³⁴Am	Fermion	95	p	139	n	?	0	234.047'809'000'0	u	~ 0	%	~ 0	43.173'000'000'0	MeV	7.567'000'000'0	MeV	-		-		4.41E-6	year	139.020	seconds ( x⁰ )	100.000'000	%	β+	3,162.000	keV	²³⁴Pu	²³⁴Am > [ 100 % , β+ , 3,162.0 keV ] > ²³⁴Pu			α	6,872.000	keV	²³⁰Np	²³⁴Am > [ , α , 6,872.0 keV ] > ²³⁰Np	0.006'600	%	β+SF	?	keV	V	²³⁴Am > [ 0.0066 % , β+SF , ? keV ] > V																						100.080'517	%	²⁰⁶Pb	0.000'002	%	²⁰⁵Tl	0.000'000	%	²⁰⁸Pb
Isotope_095_am_235_u	Unstable	²³⁵Am	Boson	95	p	140	n	5/2	-1	235.047'946'000'0	u	~ 0	%	~ 0	44.534'000'000'0	MeV	7.563'000'000'0	MeV	-		-		1.87E-5	year	589.980	seconds ( x⁰ )	100.000'000	%	β+	1,456.000	keV	²³⁵Pu	²³⁵Am > [ 100 % , β+ , 1,456.0 keV ] > ²³⁵Pu			α	6,612.000	keV	²³¹Np	²³⁵Am > [ , α , 6,612.0 keV ] > ²³¹Np																													100.682'850	%	²⁰⁷Pb	0.000'000	%	²⁰⁵Tl	0.000'000	%	²⁰⁶Pb	?	%	¹⁸⁰Hf
Isotope_095_am_236_u	Unstable	²³⁶Am	Fermion	95	p	141	n	?	0	236.049'579'000'0	u	~ 0	%	~ 0	44.662'000'000'0	MeV	7.565'000'000'0	MeV	-		-		5.70E-5	year	1.800	kilo-seconds ( x³ )	?	%	β+	2,258.000	keV	²³⁶Pu	²³⁶Am > [ ? % , β+ , 2,258.0 keV ] > ²³⁶Pu			α	6,397.000	keV	²³²Np	²³⁶Am > [ , α , 6,397.0 keV ] > ²³²Np																													?	%	²⁰⁸Pb	?	%	²⁰⁶Pb	?	%	²⁰⁰Hg	0.000'000	%	²⁰⁸Pb
Isotope_095_am_237_u	Unstable	²³⁷Am	Boson	95	p	142	n	5/2	-1	237.049'996'000'0	u	~ 0	%	~ 0	46.183'000'000'0	MeV	7.561'000'000'0	MeV	-		-		1.39E-4	year	4.392	kilo-seconds ( x³ )	100.000'000	%	β+	454.800	keV	²³⁷Pu	²³⁷Am > [ 100 % , β+ , 454.8 keV ] > ²³⁷Pu			α	6,196.000	keV	²³³Np	²³⁷Am > [ , α , 6,196.0 keV ] > ²³³Np																													100.042'004	%	²⁰⁵Tl	0.000'000	%	²⁰⁷Pb
Isotope_095_am_238_u	Unstable	²³⁸Am	Fermion	95	p	143	n	1	1	238.051'984'324'0	u	~ 0	%	~ 0	46.571'000'000'0	MeV	7.561'000'000'0	MeV	-		-		1.87E-4	year	5.904	kilo-seconds ( x³ )	100.000'000	%	β+	1,236.100	keV	²³⁸Pu	²³⁸Am > [ 100 % , β+ , 1,236.1 keV ] > ²³⁸Pu			α	6,041.700	keV	²³⁴Np	²³⁸Am > [ , α , 6,041.7 keV ] > ²³⁴Np																													100.044'259	%	²⁰⁶Pb	0.000'002	%	²⁰⁵Tl	0.000'000	%	²⁰⁸Pb
Isotope_095_am_239_u	Unstable	²³⁹Am	Boson	95	p	144	n	5/2	-1	239.053'024'479'0	u	~ 0	%	~ 0	48.423'087'000'0	MeV	7.555'578'000'0	MeV	-		-		1.36E-3	year	42.804	kilo-seconds ( x³ )	100.000'000	%	ϵ	802.110	keV	²³⁹Pu	²³⁹Am > [ 100 % , ϵ , 802.11 keV ] > ²³⁹Pu			α	5,922.400	keV	²³⁵Np	²³⁹Am > [ , α , 5,922.4 keV ] > ²³⁵Np																													100.286'342	%	²⁰⁷Pb	0.000'000	%	²⁰⁵Tl	0.000'000	%	²⁰⁶Pb	0.000'000	%	¹⁶⁰Dy	0.000'000	%	¹⁴⁰Ce	?	%	¹⁷²Yb	?	%	¹⁷⁶Hf	?	%	¹⁵²Sm	?	%	¹⁸⁰Hf	?	%	¹⁵⁶Gd	?	%	¹⁶⁸Er	?	%	¹⁶⁴Dy
Isotope_095_am_240_u	Unstable	²⁴⁰Am	Fermion	95	p	145	n	3	-1	240.055'300'179'0	u	~ 0	%	~ 0	49.391'985'000'0	MeV	7.553'681'000'0	MeV	-		-		5.80E-3	year	182.995	kilo-seconds ( x³ )	100.000'000	%	β+	362.600	keV	²⁴⁰Pu	²⁴⁰Am > [ 100 % , β+ , 362.6 keV ] > ²⁴⁰Pu			α	5,707.600	keV	²³⁷Np	²⁴⁰Am > [ , α , 5,707.6 keV ] > ²³⁷Np																													100.004'190	%	²⁰⁸Pb	0.000'000	%	²⁰⁶Pb	?	%	²⁰⁰Hg	0.000'000	%	²⁰⁸Pb
Isotope_095_am_241_u	Unstable	²⁴¹Am	Boson	95	p	146	n	5/2	-1	241.056'829'144'0	u	~ 0	%	~ 0	51.511'785'000'0	MeV	7.547'006'000'0	MeV	1.610'000'000'0	nm	-		4.33E+2	years	13.649	giga-seconds ( x⁹ )	100.000'000	%	α	5,637.820	keV	²³⁷Np	²⁴¹Am > [ 100 % , α , 5,637.82 keV ] > ²³⁷Np			SF	?	keV	V	²⁴¹Am > [ , SF , ? keV ] > V	0.000'000	%	³⁴Si	?	keV	²⁰⁷Tl	²⁴¹Am > [ 0.000000000000074 % , ³⁴Si , ? keV ] > ²⁰⁷Tl																						100.012'800	%	²⁰⁵Tl	0.000'000	%	²⁰⁷Pb
Isotope_095_am_242_u	Unstable	²⁴²Am	Fermion	95	p	147	n	1	-1	242.059'549'159'0	u	~ 0	%	~ 0	52.936'008'000'0	MeV	7.543'272'000'0	MeV	0.387'900'000'0	nm	4.200'000'000'0	b	1.83E-3	year	57.670	kilo-seconds ( x³ )	82.700'000	%	β-	664.467	keV	²⁴²Cm	²⁴²Am > [ 82.7 % , β- , 664.467 keV ] > ²⁴²Cm			ϵ	751.295	keV	²⁴²Pu	²⁴²Am > [ , ϵ , 751.295 keV ] > ²⁴²Pu																													100.044'159	%	²⁰⁶Pb	0.000'002	%	²⁰⁵Tl	0.000'000	%	²⁰⁷Pb
Isotope_095_am_243_u	Unstable	²⁴³Am	Boson	95	p	148	n	5/2	-1	243.061'381'080'0	u	~ 0	%	~ 0	55.469'685'000'0	MeV	7.535'7.535'7.535'7.535	MeV	1.530'000'000'0	nm	-2.140'000'000'0	b	7.39E+3	years	233.148	giga-seconds ( x⁹ )	100.000'000	%	α	5,438.810	keV	²³⁹Np	²⁴³Am > [ 100 % , α , 5,438.81 keV ] > ²³⁹Np			SF	?	keV	V	²⁴³Am > [ , SF , ? keV ] > V																													100.276'314	%	²⁰⁷Pb	0.000'000	%	²⁰⁵Tl	0.000'000	%	²⁰⁶Pb	0.000'000	%	¹⁶⁰Dy	0.000'000	%	¹⁴⁰Ce	?	%	¹⁷²Yb	?	%	¹⁷⁶Hf	?	%	¹⁵²Sm	?	%	¹⁸⁰Hf	?	%	¹⁵⁶Gd	?	%	¹⁶⁸Er	?	%	¹⁶⁴Dy
Isotope_095_am_244_u	Unstable	²⁴⁴Am	Fermion	95	p	149	n	6	-1	244.064'284'847'0	u	~ 0	%	~ 0	57.176'109'000'0	MeV	7.530'169'000'0	MeV	-		4.300'000'000'0	b	1.15E-3	year	36.396	kilo-seconds ( x³ )	100.000'000	%	β-	1,427.300	keV	²⁴⁴Cm	²⁴⁴Am > [ 100 % , β- , 1,427.3 keV ] > ²⁴⁴Cm																																				100.004'000	%	²⁰⁸Pb	0.000'000	%	²⁰⁶Pb	?	%	²⁰⁰Hg	0.000'000	%	²⁰⁸Pb
Isotope_095_am_245_u	Unstable	²⁴⁵Am	Boson	95	p	150	n	5/2	1	245.066'452'114'0	u	~ 0	%	~ 0	59.880'951'000'0	MeV	7.521'301'000'0	MeV	-		-		2.34E-4	year	7.380	kilo-seconds ( x³ )	100.000'000	%	β-	895.040	keV	²⁴⁵Cm	²⁴⁵Am > [ 100 % , β- , 895.04 keV ] > ²⁴⁵Cm																																				100.015'250	%	²⁰⁵Tl	0.000'000	%	²⁰⁷Pb
Isotope_095_am_246_u	Unstable	²⁴⁶Am	Fermion	95	p	151	n	7	1	246.069'774'619'0	u	~ 0	%	~ 0	61.899'746'000'0	MeV	7.515'306'000'0	MeV	-		-		4.21E-5	year	1.328	kilo-seconds ( x³ )	100.000'000	%	β-	2,376.200	keV	²⁴⁶Cm	²⁴⁶Am > [ 100 % , β- , 2,376.2 keV ] > ²⁴⁶Cm																																				100.044'159	%	²⁰⁶Pb	0.000'002	%	²⁰⁵Tl	0.000'000	%	²⁰⁸Pb
Isotope_095_am_247_u	Unstable	²⁴⁷Am	Boson	95	p	152	n	5/2	0	247.072'093'000'0	u	~ 0	%	~ 0	64.994'640'000'0	MeV	7.504'986'000'0	MeV	-		-		4.43E-5	year	1.398	kilo-seconds ( x³ )	100.000'000	%	β-	1,620.000	keV	²⁴⁷Cm	²⁴⁷Am > [ 100 % , β- , 1,620.0 keV ] > ²⁴⁷Cm																																				100.276'314	%	²⁰⁷Pb	0.000'000	%	²⁰⁵Tl	0.000'000	%	²⁰⁶Pb	0.000'000	%	¹⁶⁰Dy	0.000'000	%	¹⁴⁰Ce	?	%	¹⁷²Yb	?	%	¹⁷⁶Hf	?	%	¹⁵²Sm	?	%	¹⁸⁰Hf	?	%	¹⁵⁶Gd	?	%	¹⁶⁸Er	?	%	¹⁶⁴Dy
Isotope_095_am_248_u	Unstable	²⁴⁸Am	Fermion	95	p	153	n	?	0	248.075'752'000'0	u	~ 0	%	~ 0	67.154'000'000'0	MeV	7.499'000'000'0	MeV	-		-		6.33E-6	year	199.800	seconds ( x⁰ )	?	%	β-	3,170.000	keV	²⁴⁸Cm	²⁴⁸Am > [ ? % , β- , 3,170.0 keV ] > ²⁴⁸Cm																																				?	%	²⁰⁸Pb	?	%	²⁰⁶Pb	?	%	²⁰⁰Hg	0.000'000	%	²⁰⁸Pb
Isotope_095_am_249_u	Unstable	²⁴⁹Am	Boson	95	p	154	n	?	0	249.078'480'000'0	u	~ 0	%	~ 0	70.562'000'000'0	MeV	7.487'000'000'0	MeV	-		-		1.90E-6	year	60.000	seconds ( x⁰ )	?	%	β-	2,354.000	keV	²⁴⁹Cm	²⁴⁹Am > [ ? % , β- , 2,354.0 keV ] > ²⁴⁹Cm																																				?	%	²⁰⁵Tl	?	%	²⁰⁷Pb

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