Periodic Table
Symbol
Am
Group Number
10
Rank: 8 (Overall)
0
17
👆🏻
Period Number
7
Rank: 1 (Overall)
2
7
👆🏻
Block
f block
Element Family
Actinide
CAS Number
7440359
Rank: 46 (Overall)
7429905
54386242
👆🏻
Space Group Name
P63/mmc
Space Group Number
194.00
Rank: 7 (Overall)
11
276
👆🏻
Facts
Interesting Facts
- Americium metal is produced by bombarding Plutonium with Neutrons.
- Americium metal was discovered as a by-product while testing an atomic bomb (Manhattan Project).
Sources
Obtained By Bombarding Plutonium with Neutrons
History
Who Discovered
Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso
Discovery
In 1944
Abundance
Abundance In Universe
0.00 %
Rank: 35 (Overall)
0
0.11
👆🏻
Abundance In Sun
0.00 %
Rank: 30 (Overall)
0
0.1
👆🏻
Abundance In Meteorites
0.00 %
Rank: 54 (Overall)
0
22
👆🏻
Abundance In Earth's Crust
0.00 %
Rank: 59 (Overall)
1E-37
8.1
👆🏻
Abundance In Oceans
-
0
1.1
👆🏻
Abundance In Humans
0.00 %
Rank: 24 (Overall)
0
1.4
👆🏻
Uses
Uses & Benefits
- Americium metal is used in smoke detection alarms.
-
In the future, this metal has a potential to be used in batteries of spacecrafts.
Industrial Uses
-
Medical Uses
-
Other Uses
Alloys, Nuclear Research, Research Purposes
Biological Properties
Toxicity
Toxic
Present in Human Body
✔
✘
7% - Actinide Series Metals
In Blood
0.00 Blood/mg dm-3
Rank: 40 (Overall)
0
1970
👆🏻
In Bone
0.00 p.p.m.
Rank: 41 (Overall)
0
170000
👆🏻
Physical
Melting Point
994.00 °C
Rank: 45 (Overall)
-38.83
3410
👆🏻
Boiling Point
2,607.00 °C
Rank: 43 (Overall)
0
5660
👆🏻
Appearance
Physical State
Solid
Color
Silvery White
Luster
-
Hardness
Mohs Hardness
6.00
Rank: 6 (Overall)
0.2
8.5
👆🏻
Brinell Hardness
260.00 MPa
Rank: 44 (Overall)
0.14
3490
👆🏻
Vickers Hardness
600.00 MPa
Rank: 28 (Overall)
0
3920
👆🏻
Speed of Sound
2,750.00 m/s
Rank: 44 (Overall)
818
16200
👆🏻
Optical Properties
Refractive Index
1.30
Rank: 43 (Overall)
0.155
3.41
👆🏻
Reflectivity
64.00 %
Rank: 19 (Overall)
5
97
👆🏻
Allotropes
✔
✘
No - Actinide Series Metals has it !
α Allotropes
-
β Allotropes
-
γ Allotropes
-
Chemical
Chemical Formula
Am
Isotopes
Known Isotopes
16
Rank: 23 (Overall)
0
38
👆🏻
Electronegativity
Pauling Electronegativity
1.30
Rank: 33 (Overall)
0
2.6
👆🏻
Sanderson Electronegativity
1.30
Rank: 25 (Overall)
0.22
2.56
👆🏻
Allred Rochow Electronegativity
1.20
Rank: 28 (Overall)
0.86
1.9
👆🏻
Mulliken-Jaffe Electronegativity
1.30
Rank: 33 (Overall)
0.62
2.48
👆🏻
Allen Electronegativity
1.30
Rank: 40 (Overall)
0.659
2.7
👆🏻
Electropositivity
Pauling Electropositivity
2.70
Rank: 22 (Overall)
1.46
3.3
👆🏻
Ionization Energies
1st Energy Level
578.00 kJ/mol
Rank: 65 (Overall)
375.7
26130
👆🏻
2nd Energy Level
1,158.00 kJ/mol
Rank: 68 (Overall)
392.8
28750
👆🏻
3rd Energy Level
2,132.00 kJ/mol
Rank: 71 (Overall)
392.8
34230
👆🏻
4th Energy Level
3,493.00 kJ/mol
Rank: 66 (Overall)
375.7
37066
👆🏻
5th Energy Level
5,780.00 kJ/mol
Rank: 57 (Overall)
392
97510
👆🏻
6th Energy Level
5,780.00 kJ/mol
Rank: 70 (Overall)
1007
105800
👆🏻
7th Energy level
5,780.00 kJ/mol
Rank: 61 (Overall)
1007
114300
👆🏻
8th Energy Level
5,780.00 kJ/mol
Rank: 59 (Overall)
730
125300
👆🏻
9th Energy Level
5,780.00 kJ/mol
Rank: 58 (Overall)
1007
134700
👆🏻
10th Energy Level
5,780.00 kJ/mol
Rank: 60 (Overall)
392
144300
👆🏻
11th Energy Level
5,780.00 kJ/mol
Rank: 64 (Overall)
392
169988
👆🏻
12th Energy Level
62,400.00 kJ/mol
Rank: 11 (Overall)
0
189368
👆🏻
13th Energy Level
5,780.00 kJ/mol
Rank: 53 (Overall)
1007
76015
👆🏻
14th Energy Level
5,780.00 kJ/mol
Rank: 42 (Overall)
380
86450
👆🏻
15th Energy Level
62,400.00 kJ/mol
Rank: 39 (Overall)
33000
100700
👆🏻
16th Energy Level
57,800.00 kJ/mol
Rank: 43 (Overall)
375.7
109480
👆🏻
17th Energy Level
578.00 kJ/mol
Rank: 68 (Overall)
375.7
122200
👆🏻
18th Energy Level
5,780.00 kJ/mol
Rank: 56 (Overall)
0
134810
👆🏻
19th Energy Level
578.00 kJ/mol
Rank: 66 (Overall)
375.7
148700
👆🏻
20th Energy Level
578.00 kJ/mol
Rank: 60 (Overall)
0
171200
👆🏻
21st Energy Level
5,780.00 kJ/mol
Rank: 22 (Overall)
375.7
179100
👆🏻
22nd Energy Level
578.00 kJ/mol
Rank: 55 (Overall)
330
184900
👆🏻
23rd Energy Level
5,780.00 kJ/mol
Rank: 23 (Overall)
357.6
198800
👆🏻
24th Energy Level
578.00 kJ/mol
Rank: 57 (Overall)
297.3
195200
👆🏻
25th Energy Level
578.00 kJ/mol
Rank: 57 (Overall)
0
121900
👆🏻
26th Energy Level
578.00 kJ/mol
Rank: 64 (Overall)
357.6
127700
👆🏻
27th Energy Level
578.00 kJ/mol
Rank: 60 (Overall)
0
133800
👆🏻
28th Energy Level
578.00 kJ/mol
Rank: 64 (Overall)
297.3
139800
👆🏻
29th Energy Level
578.00 kJ/mol
Rank: 66 (Overall)
0
148100
👆🏻
30th Energy Level
578.00 kJ/mol
Rank: 61 (Overall)
0
154500
👆🏻
Electrochemical Equivalent
3.02 g/amp-hr
Rank: 20 (Overall)
0.16812
8.3209
👆🏻
Electron Work Function
4.30 eV
Rank: 25 (Overall)
2.14
6
👆🏻
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Atomic
Atomic Number
95
Rank: 23 (Overall)
3
117
👆🏻
Electron Configuration
[Rn] 5f7 7s2
Crystal Structure
Double Hexagonal Close Packed (DHCP)
Crystal Lattice
Atom
Number of Protons
95
Rank: 23 (Overall)
3
117
👆🏻
Number of Neutrons
148
Rank: 13 (Overall)
4
285
👆🏻
Number of Electrons
95
Rank: 23 (Overall)
3
117
👆🏻
Radius of an Atom
Atomic Radius
173.00 pm
Rank: 23 (Overall)
0
348
👆🏻
Covalent Radius
180.00 pm
Rank: 23 (Overall)
0
260
👆🏻
Van der Waals Radius
244.00 pm
Rank: 14 (Overall)
0
348
👆🏻
Atomic Weight
243.00 amu
Rank: 20 (Overall)
6.94
294
👆🏻
Atomic Volume
17.86 cm3/mol
Rank: 42 (Overall)
1.39
71.07
👆🏻
Adjacent Atomic Numbers
Previous Element
Next Element
Valence Electron Potential
44.00 (-eV)
Rank: 41 (Overall)
0
392.42
👆🏻
Lattice Constant
346.81 pm
Rank: 49 (Overall)
0
891.25
👆🏻
Lattice Angles
π/2, π/2, 2 π/3
Lattice C/A Ratio
1.58
Rank: 34 (Overall)
0.423
1.9
👆🏻
Mechanical
Density
Density At Room Temperature
12.00 g/cm3
Rank: 32 (Overall)
0.534
40.7
👆🏻
Density When Liquid (at m.p.)
13.67 g/cm3
Rank: 26 (Overall)
0.512
41
👆🏻
Tensile Strength
80.00 MPa
Rank: 29 (Overall)
0.1
11000
👆🏻
Viscosity
0.00
Rank: 25 (Overall)
1.5E-05
0.0035
👆🏻
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa)
Rank: 13 (Overall)
0
121
👆🏻
Vapor Pressure at 2000 K
0.00 (Pa)
Rank: 24 (Overall)
0
774
👆🏻
Elasticity properties
Shear Modulus
26.00 GPa
Rank: 36 (Overall)
1.3
222
👆🏻
Bulk Modulus
44.00 GPa
Rank: 32 (Overall)
0
462
👆🏻
Young's Modulus
58.00 GPa
Rank: 36 (Overall)
0
528
👆🏻
Poisson Ratio
0.30
Rank: 14 (Overall)
0.032
0.47
👆🏻
Other Mechanical Properties
-
Magnetic
Magnetic Characteristics
Specific Gravity
13.67
Rank: 26 (Overall)
0.53
4500
👆🏻
Magnetic Ordering
Paramagnetic
Permeability
0.00 H/m
Rank: 16 (Overall)
1.25643E-06
0.0063
👆🏻
Susceptibility
0.00
Rank: 24 (Overall)
-0.000166
200000
👆🏻
Electrical Properties
Electrical Property
-
Resistivity
0.69 nΩ·m
Rank: 78 (Overall)
0.1
961
👆🏻
Electrical Conductivity
0.02 106/cm Ω
Rank: 48 (Overall)
0
0.63
👆🏻
Electron Affinity
63.90 kJ/mol
Rank: 18 (Overall)
0
222.8
👆🏻
Thermal
Specific Heat
0.11 J/(kg K)
Rank: 43 (Overall)
0.1
3.6
👆🏻
Molar Heat Capacity
62.70 J/mol·K
Rank: 1 (Overall)
13.1
62.7
👆🏻
Thermal Conductivity
10.00 W/m·K
Rank: 68 (Overall)
0
429
👆🏻
Critical Temperature
1,449.00 K
Rank: 41 (Overall)
26.3
3695
👆🏻
Thermal Expansion
13.60 µm/(m·K)
Rank: 32 (Overall)
4.5
97
👆🏻
Enthalpy
Enthalpy of Vaporization
161.00 kJ/mol
Rank: 67 (Overall)
7.32
799.1
👆🏻
Enthalpy of Fusion
14.39 kJ/mol
Rank: 27 (Overall)
2.1
35.23
👆🏻
Enthalpy of Atomization
268.00 kJ/mol
Rank: 52 (Overall)
61.5
837
👆🏻
Standard Molar Entropy
63.10 J/mol.K
Rank: 23 (Overall)
9.5
198.1
👆🏻