Am Element | Americium Element | Properties of Americium Element

Americium

Periodic Table

Symbol

Group Number

10 8

Period Number

7 1

Block

f block

Element Family

Actinide

CAS Number

7440359 46

Space Group Name

P63/mmc

Space Group Number

194.00 7

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 % 35

Abundance In Sun

0.00 % 30

Abundance In Meteorites

0.00 % 54

Abundance In Earth's Crust

0.00 % 59

Abundance In Oceans

Abundance In Humans

0.00 % 24

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

In Blood

0.00 Blood/mg dm-3 40

In Bone

0.00 p.p.m. 41

Physical

Melting Point

994.00 °C 45

Boiling Point

2,607.00 °C 43

Appearance

Physical State

Solid

Color

Silvery White

Luster

Hardness

Mohs Hardness

6.00 6

Brinell Hardness

260.00 MPa 44

Vickers Hardness

600.00 MPa 28

Speed of Sound

2,750.00 m/s 44

Optical Properties

Refractive Index

1.30 43

Reflectivity

64.00 % 19

Allotropes

α Allotropes

β Allotropes

γ Allotropes

Chemical

Chemical Formula

Isotopes

Known Isotopes

16 23

Electronegativity

Pauling Electronegativity

1.30 33

Sanderson Electronegativity

1.30 25

Allred Rochow Electronegativity

1.20 28

Mulliken-Jaffe Electronegativity

1.30 33

Allen Electronegativity

1.30 40

Electropositivity

Pauling Electropositivity

2.70 22

Ionization Energies

1st Energy Level

578.00 kJ/mol 65

2nd Energy Level

1,158.00 kJ/mol 68

3rd Energy Level

2,132.00 kJ/mol 71

4th Energy Level

3,493.00 kJ/mol 66

5th Energy Level

5,780.00 kJ/mol 57

6th Energy Level

5,780.00 kJ/mol 70

7th Energy level

5,780.00 kJ/mol 61

8th Energy Level

5,780.00 kJ/mol 59

9th Energy Level

5,780.00 kJ/mol 58

10th Energy Level

5,780.00 kJ/mol 60

11th Energy Level

5,780.00 kJ/mol 64

12th Energy Level

62,400.00 kJ/mol 11

13th Energy Level

5,780.00 kJ/mol 53

14th Energy Level

5,780.00 kJ/mol 42

15th Energy Level

62,400.00 kJ/mol 39

16th Energy Level

57,800.00 kJ/mol 43

17th Energy Level

578.00 kJ/mol 68

18th Energy Level

5,780.00 kJ/mol 56

19th Energy Level

578.00 kJ/mol 66

20th Energy Level

578.00 kJ/mol 60

21st Energy Level

5,780.00 kJ/mol 22

22nd Energy Level

578.00 kJ/mol 55

23rd Energy Level

5,780.00 kJ/mol 23

24th Energy Level

578.00 kJ/mol 57

25th Energy Level

578.00 kJ/mol 57

26th Energy Level

578.00 kJ/mol 64

27th Energy Level

578.00 kJ/mol 60

28th Energy Level

578.00 kJ/mol 64

29th Energy Level

578.00 kJ/mol 66

30th Energy Level

578.00 kJ/mol 61

Electrochemical Equivalent

3.02 g/amp-hr 20

Electron Work Function

4.30 eV 25

Other Chemical Properties

Ionization, Radioactive Isotopes, Radioactivity, Solubility

Atomic

Atomic Number

95 23

Electron Configuration

[Rn] 5f⁷ 7s²

Crystal Structure

Double Hexagonal Close Packed (DHCP)

Crystal Lattice

DHCP-Crystal-Structure-of-Americium.jpg#100

Atom

Number of Protons

95 23

Number of Neutrons

148 13

Number of Electrons

95 23

Radius of an Atom

Atomic Radius

173.00 pm 23

Covalent Radius

180.00 pm 23

Van der Waals Radius

244.00 pm 14

Atomic Weight

243.00 amu 20

Atomic Volume

17.86 cm3/mol 42

Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential

44.00 (-eV) 41

Lattice Constant

346.81 pm 49

Lattice Angles

π/2, π/2, 2 π/3

Lattice C/A Ratio

1.58 34

Mechanical

Density

Density At Room Temperature

12.00 g/cm³ 32

Density When Liquid (at m.p.)

13.67 g/cm3 26

Tensile Strength

80.00 MPa 29

Viscosity

0.00 25

Vapor Pressure

Vapor Pressure at 1000 K

0.00 (Pa) 13

Vapor Pressure at 2000 K

0.00 (Pa) 24

Elasticity properties

Shear Modulus

26.00 GPa 36

Bulk Modulus

44.00 GPa 32

Young's Modulus

58.00 GPa 36

Poisson Ratio

0.30 14

Other Mechanical Properties

Magnetic

Magnetic Characteristics

Specific Gravity

13.67 26

Magnetic Ordering

Paramagnetic

Permeability

0.00 H/m 16

Susceptibility

0.00 24

Electrical Properties

Electrical Property

Resistivity

0.69 nΩ·m 78

Electrical Conductivity

0.02 10⁶/cm Ω 48

Electron Affinity

63.90 kJ/mol 18

Thermal

Specific Heat

0.11 J/(kg K) 43

Molar Heat Capacity

62.70 J/mol·K 1

Thermal Conductivity

10.00 W/m·K 68

Critical Temperature

1,449.00 K 41

Thermal Expansion

13.60 µm/(m·K) 32

Enthalpy

Enthalpy of Vaporization

161.00 kJ/mol 67

Enthalpy of Fusion

14.39 kJ/mol 27

Enthalpy of Atomization

268.00 kJ/mol 52

Standard Molar Entropy

63.10 J/mol.K 23

Summary >>

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