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Americium
Americium




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What is Americium?

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1 Periodic Table

1.1 Symbol

Am

1.2 Group Number

Not Available
Rank: N/A (Overall)
0 17

1.3 Period Number

7
Rank: 1 (Overall)
2 7

1.4 Block

f block

1.5 Element Family

Actinide

1.6 CAS Number

7440359
Rank: 46 (Overall)
7429905 54386242

1.7 Space Group Name

P63/mmc

1.8 Space Group Number

194.00
Rank: 5 (Overall)
11 229

2 Facts

2.1 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).

2.2 Sources

Obtained By Bombarding Plutonium with Neutrons

2.3 History

2.3.1 Who Discovered

Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso

2.3.2 Discovery

In 1944

2.4 Abundance

2.4.1 Abundance In Universe

Not Available
Rank: N/A (Overall)
5E-09 0.11

2.4.2 Abundance In Sun

~-9999 %
Rank: N/A (Overall)
1E-08 0.1

2.4.3 Abundance In Meteorites

Not Available
Rank: N/A (Overall)
1.7E-07 22

2.4.4 Abundance In Earth's Crust

Not Available
Rank: N/A (Overall)
9.9E-12 8.1

2.4.5 Abundance In Oceans

Not Available
Rank: N/A (Overall)
2E-23 1.1

2.4.6 Abundance In Humans

Not Available
Rank: N/A (Overall)
1E-13 1.4

3 Uses

3.1 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.

3.1.1 Industrial Uses

NA

3.1.2 Medical Uses

NA

3.1.3 Other Uses

Alloys, Nuclear Research, Research Purposes

3.2 Biological Properties

3.2.1 Toxicity

Toxic

3.2.2 Present in Human Body

7% - Actinide Series Metals have it !

3.2.3 In Blood

0.00 Blood/mg dm-3
Rank: 37 (Overall)
0 1970

3.2.4 In Bone

0.00 p.p.m.
Rank: 36 (Overall)
0 170000

4 Physical

4.1 Melting Point

994.00 °C
Rank: 45 (Overall)
27 3410

4.2 Boiling Point

2,607.00 °C
Rank: 41 (Overall)
147 5660

4.3 Appearance

4.3.1 Physical State

Solid

4.3.2 Color

Silvery White

4.3.3 Luster

NA

4.4 Hardness

4.4.1 Mohs Hardness

Not Available
Rank: N/A (Overall)
0.2 8.5

4.4.2 Brinell Hardness

Not Available
Rank: N/A (Overall)
0.14 3490

4.4.3 Vickers Hardness

Not Available
Rank: N/A (Overall)
121 3430

4.5 Speed of Sound

Not Available
Rank: N/A (Overall)
818 16200

4.6 Optical Properties

4.6.1 Refractive Index

Not Available
Rank: N/A (Overall)
1.000933 1.7229

4.6.2 Reflectivity

Not Available
Rank: N/A (Overall)
58 97

4.7 Allotropes

No - Actinide Series Metals has it !

4.7.1 α Allotropes

Not Available

4.7.2 β Allotropes

Not Available

4.7.3 γ Allotropes

Not Available

5 Chemical

5.1 Chemical Formula

Am

5.2 Isotopes

5.2.1 Known Isotopes

16
Rank: 23 (Overall)
0 38

5.3 Electronegativity

5.3.1 Pauling Electronegativity

1.30
Rank: 32 (Overall)
0.7 2.54

5.3.2 Sanderson Electronegativity

Not Available
Rank: N/A (Overall)
0.22 2.56

5.3.3 Allred Rochow Electronegativity

1.20
Rank: 27 (Overall)
0.86 1.82

5.3.4 Mulliken-Jaffe Electronegativity

Not Available
Rank: N/A (Overall)
0.62 2.48

5.3.5 Allen Electronegativity

Not Available
Rank: N/A (Overall)
0.659 2.7

5.4 Electropositivity

5.4.1 Pauling Electropositivity

2.70
Rank: 22 (Overall)
1.46 3.3

5.5 Ionization Energies

5.5.1 1st Energy Level

578.00 kJ/mol
Rank: 65 (Overall)
375.7 26130

5.5.2 2nd Energy Level

1,158.00 kJ/mol
Rank: 67 (Overall)
710.2162 28750

5.5.3 3rd Energy Level

2,132.00 kJ/mol
Rank: 68 (Overall)
1600 34230

5.5.4 4th Energy Level

3,493.00 kJ/mol
Rank: 56 (Overall)
2780 37066

5.5.5 5th Energy Level

Not Available
Rank: N/A (Overall)
4305.2 97510

5.5.6 6th Energy Level

Not Available
Rank: N/A (Overall)
5715.8 105800

5.5.7 7th Energy level

Not Available
Rank: N/A (Overall)
7226.8 114300

5.5.8 8th Energy Level

Not Available
Rank: N/A (Overall)
8857.4 125300

5.5.9 9th Energy Level

Not Available
Rank: N/A (Overall)
14110 134700

5.5.10 10th Energy Level

Not Available
Rank: N/A (Overall)
17100 144300

5.5.11 11th Energy Level

Not Available
Rank: N/A (Overall)
19900 169988

5.5.12 12th Energy Level

Not Available
Rank: N/A (Overall)
22219 189368

5.5.13 13th Energy Level

Not Available
Rank: N/A (Overall)
26930 76015

5.5.14 14th Energy Level

Not Available
Rank: N/A (Overall)
29196 86450

5.5.15 15th Energy Level

Not Available
Rank: N/A (Overall)
41987 97510

5.5.16 16th Energy Level

Not Available
Rank: N/A (Overall)
47206 109480

5.5.17 17th Energy Level

Not Available
Rank: N/A (Overall)
52737 122200

5.5.18 18th Energy Level

Not Available
Rank: N/A (Overall)
58570 134810

5.5.19 19th Energy Level

Not Available
Rank: N/A (Overall)
64702 148700

5.5.20 20th Energy Level

Not Available
Rank: N/A (Overall)
80400 171200

5.5.21 21st Energy Level

Not Available
Rank: N/A (Overall)
87000 179100

5.5.22 22nd Energy Level

Not Available
Rank: N/A (Overall)
93400 184900

5.5.23 23rd Energy Level

Not Available
Rank: N/A (Overall)
98420 198800

5.5.24 24th Energy Level

Not Available
Rank: N/A (Overall)
104400 195200

5.5.25 25th Energy Level

Not Available
Rank: N/A (Overall)
121900 121900

5.5.26 26th Energy Level

Not Available
Rank: N/A (Overall)
127700 127700

5.5.27 27th Energy Level

Not Available
Rank: N/A (Overall)
133800 133800

5.5.28 28th Energy Level

Not Available
Rank: N/A (Overall)
139800 139800

5.5.29 29th Energy Level

Not Available
Rank: N/A (Overall)
148100 148100

5.5.30 30th Energy Level

Not Available
Rank: N/A (Overall)
154500 154500

5.6 Electrochemical Equivalent

3.02 g/amp-hr
Rank: 17 (Overall)
0.16812 8.3209

5.7 Electron Work Function

Not Available
Rank: N/A (Overall)
2.14 5.65

5.8 Other Chemical Properties

Ionization, Radioactive Isotopes, Radioactivity, Solubility

6 Atomic

6.1 Atomic Number

95
Rank: 23 (Overall)
3 117

6.2 Electron Configuration

[Rn] 5f7 7s2

6.3 Crystal Structure

Double Hexagonal Close Packed (DHCP)

6.3.1 Crystal Lattice

6.4 Atom

6.4.1 Number of Protons

95
Rank: 23 (Overall)
3 117

6.4.2 Number of Neutrons

148
Rank: 12 (Overall)
4 184

6.4.3 Number of Electrons

95
Rank: 23 (Overall)
3 117

6.5 Radius of an Atom

6.5.1 Atomic Radius

173.00 pm
Rank: 21 (Overall)
112 265

6.5.2 Covalent Radius

180.00 pm
Rank: 21 (Overall)
96 260

6.5.3 Van der Waals Radius

244.00 pm
Rank: 10 (Overall)
139 348

6.6 Atomic Weight

243.00 amu
Rank: 20 (Overall)
6.94 294

6.7 Atomic Volume

17.86 cm3/mol
Rank: 29 (Overall)
1.39 71.07

6.8 Adjacent Atomic Numbers

6.8.1 Previous Element

6.8.2 Next Element

6.9 Valence Electron Potential

44.00 (-eV)
Rank: 40 (Overall)
8 392.42

6.10 Lattice Constant

346.81 pm
Rank: 44 (Overall)
228.58 891.25

6.11 Lattice Angles

π/2, π/2, 2 π/3

6.12 Lattice C/A Ratio

Not Available
Rank: N/A (Overall)
1.567 1.886

7 Mechanical

7.1 Density

7.1.1 Density At Room Temperature

12.00 g/cm3
Rank: 30 (Overall)
0.534 40.7

7.1.2 Density When Liquid (at m.p.)

Not Available
Rank: N/A (Overall)
0.512 20

7.2 Tensile Strength

Not Available
Rank: N/A (Overall)
2.5 11000

7.3 Viscosity

Not Available
Rank: N/A (Overall)
0.001526 0.001526

7.4 Vapor Pressure

7.4.1 Vapor Pressure at 1000 K

0.00 (Pa)
Rank: 13 (Overall)
2.47E-11 121

7.4.2 Vapor Pressure at 2000 K

Not Available
Rank: N/A (Overall)
2.62E-10 774

7.5 Elasticity properties

7.5.1 Shear Modulus

Not Available
Rank: N/A (Overall)
1.3 222

7.5.2 Bulk Modulus

Not Available
Rank: N/A (Overall)
1.6 462

7.5.3 Young's Modulus

Not Available
Rank: N/A (Overall)
1.7 528

7.6 Poisson Ratio

Not Available
Rank: N/A (Overall)
0.032 0.47

7.7 Other Mechanical Properties

NA

8 Magnetic

8.1 Magnetic Characteristics

8.1.1 Specific Gravity

13.67
Rank: 15 (Overall)
0.53 4500

8.1.2 Magnetic Ordering

Paramagnetic

8.1.3 Permeability

Not Available
Rank: N/A (Overall)
1.25643E-06 0.0063

8.1.4 Susceptibility

Not Available
Rank: N/A (Overall)
-0.000166 200000

8.2 Electrical Properties

8.2.1 Electrical Property

Unknown

8.2.2 Resistivity

0.69 nΩ·m
Rank: 66 (Overall)
0.18 961

8.2.3 Electrical Conductivity

0.02 106/cm Ω
Rank: 43 (Overall)
0.00666 0.63

8.2.4 Electron Affinity

Not Available
Rank: N/A (Overall)
0 222.8

9 Thermal

9.1 Specific Heat

0.11 J/(kg K)
Rank: 41 (Overall)
0.11 3.6

9.2 Molar Heat Capacity

62.70 J/mol·K
Rank: 1 (Overall)
16.443 62.7

9.3 Thermal Conductivity

10.00 W/m·K
Rank: 65 (Overall)
6.3 429

9.4 Critical Temperature

Not Available
Rank: N/A (Overall)
26.3 3223

9.5 Thermal Expansion

Not Available
Rank: N/A (Overall)
4.5 97

9.6 Enthalpy

9.6.1 Enthalpy of Vaporization

Not Available
Rank: N/A (Overall)
7.32 799.1

9.6.2 Enthalpy of Fusion

14.39 kJ/mol
Rank: 24 (Overall)
2.1 35.23

9.6.3 Enthalpy of Atomization

268.00 kJ/mol
Rank: 40 (Overall)
61.5 837

9.7 Standard Molar Entropy

Not Available
Rank: N/A (Overall)
9.5 198.1