Francium

Promethium

Francium vs Promethium

Francium

Promethium

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1 Periodic Table

1.1 Symbol

1.2 Group Number

1NA

0 17

1.3 Period Number

2 7

1.5 Block

s block

f block

1.6 Element Family

Alkali

Lanthanide

1.7 CAS Number

74407357440122

7429905 54386242

2.2 Space Group Name

Not Available

2.3 Space Group Number

NANA

11 229

3 Facts

3.1 Interesting Facts

223 Francium has the longest half life at 21.8.
Francium metal is produced by alpha decay in ²²⁷Actinium 227.

Promethium metal found in Pitchblende.
Promethium metal is highly radioactive metal.

3.2 Sources

Formed by Decay Process, Mining

Found in Minerals, Mining

3.3 History

3.3.1 Who Discovered

Marguerite Perey

Chien Shiung Wu, Emilio Segrè, Hans Bethe

3.3.2 Discovery

In 1939

In 1942

3.4 Abundance

3.4.1 Abundance In Universe

NANA

5E-09 0.11

3.4.3 Abundance In Sun

~-9999 %~-9999 %

1E-08 0.1

3.5.3 Abundance In Meteorites

NANA

1.7E-07 22

3.5.5 Abundance In Earth's Crust

NANA

9.9E-12 8.1

3.5.6 Abundance In Oceans

NANA

2E-23 1.1

3.5.8 Abundance In Humans

NANA

1E-13 1.4

5 Uses

5.1 Uses & Benefits

Francium has no known uses as it has a half life of only 22 minutes.

It is used for research purpose. Very small amount of this metal is used in atomic batteries.

Its radioactive decay is used for a phosphor to give off light. The light emitted is converted into electricity.

5.1.1 Industrial Uses

5.1.2 Medical Uses

5.1.3 Other Uses

5.2 Biological Properties

5.2.1 Toxicity

Non Toxic

5.2.2 Present in Human Body

✔ ✘

5.2.3 In Blood

0.00 Blood/mg dm-30.00 Blood/mg dm-3

0 1970

5.2.4 In Bone

0.00 p.p.m.NA

0 170000

6 Physical

6.1 Melting Point

27.00 °C1,042.00 °C

27 3410

6.3 Boiling Point

677.00 °C3,000.00 °C

147 5660

6.5 Appearance

6.5.1 Physical State

Solid

6.5.2 Color

Unknown

6.5.3 Luster

Metallic

6.6 Hardness

6.6.1 Mohs Hardness

NANA

0.2 8.5

6.7.1 Brinell Hardness

NANA

0.14 3490

6.8.2 Vickers Hardness

NANA

121 3430

6.9 Speed of Sound

NANA

818 16200

6.10 Optical Properties

6.10.1 Refractive Index

NANA

1.000933 1.7229

6.10.2 Reflectivity

NANA

58 97

6.11 Allotropes

✔ ✘

6.11.1 α Allotropes

Not Available

6.11.2 β Allotropes

Not Available

6.11.3 γ Allotropes

Not Available

7 Chemical

7.1 Chemical Formula

7.2 Isotopes

7.2.1 Known Isotopes

3327

0 38

7.4 Electronegativity

7.4.1 Pauling Electronegativity

0.70NA

0.7 2.54

7.4.2 Sanderson Electronegativity

NANA

0.22 2.56

7.4.3 Allred Rochow Electronegativity

0.861.07

0.86 1.82

7.4.4 Mulliken-Jaffe Electronegativity

0.68NA

0.62 2.48

7.4.5 Allen Electronegativity

0.67NA

0.659 2.7

7.5 Electropositivity

7.5.1 Pauling Electropositivity

3.30NA

1.46 3.3

7.6 Ionization Energies

7.6.1 1st Energy Level

380.00 kJ/mol540.00 kJ/mol

375.7 26130

7.6.2 2nd Energy Level

NA1,050.00 kJ/mol

710.2162 28750

7.6.3 3rd Energy Level

NA2,150.00 kJ/mol

1600 34230

7.6.4 4th Energy Level

NA3,970.00 kJ/mol

2780 37066

7.6.5 5th Energy Level

NANA

4305.2 97510

7.6.6 6th Energy Level

NANA

5715.8 105800

7.6.7 7th Energy level

NANA

7226.8 114300

7.6.8 8th Energy Level

NANA

8857.4 125300

7.6.9 9th Energy Level

NANA

14110 134700

7.6.10 10th Energy Level

NANA

17100 144300

7.6.11 11th Energy Level

NANA

19900 169988

7.6.12 12th Energy Level

NANA

22219 189368

7.6.13 13th Energy Level

NANA

26930 76015

7.6.14 14th Energy Level

NANA

29196 86450

7.6.15 15th Energy Level

NANA

41987 97510

7.6.16 16th Energy Level

NANA

47206 109480

7.6.17 17th Energy Level

NANA

52737 122200

7.6.18 18th Energy Level

NANA

58570 134810

7.6.19 19th Energy Level

NANA

64702 148700

7.6.20 20th Energy Level

NANA

80400 171200

7.6.21 21st Energy Level

NANA

87000 179100

7.6.22 22nd Energy Level

NANA

93400 184900

7.6.23 23rd Energy Level

NANA

98420 198800

7.6.24 24th Energy Level

NANA

104400 195200

7.6.25 25th Energy Level

NANA

121900 121900

7.6.26 26th Energy Level

NANA

127700 127700

7.6.27 27th Energy Level

NANA

133800 133800

7.6.28 28th Energy Level

NANA

139800 139800

7.6.29 29th Energy Level

NANA

148100 148100

7.6.30 30th Energy Level

NANA

154500 154500

7.7 Electrochemical Equivalent

8.32 g/amp-hr1.80 g/amp-hr

0.16812 8.3209

7.8 Electron Work Function

NANA

2.14 5.65

7.9 Other Chemical Properties

Ionization, Radioactive Isotopes, Radioactivity, Solubility

Ionization, Radioactive Isotopes, Solubility

8 Atomic

8.1 Atomic Number

8761

3 117

8.2 Electron Configuration

[Rn] 7s¹

[Xe] 4f⁵ 6s²

8.3 Crystal Structure

Body Centered Cubic (BCC)

Double Hexagonal Close Packed (DHCP)

8.3.1 Crystal Lattice

8.4 Atom

8.4.1 Number of Protons

8761

3 117

8.4.2 Number of Neutrons

13684

4 184

8.4.3 Number of Electrons

8761

3 117

8.5 Radius of an Atom

8.5.1 Atomic Radius

NA183.00 pm

112 265

8.5.2 Covalent Radius

260.00 pm199.00 pm

96 260

8.5.3 Van der Waals Radius

348.00 pm236.00 pm

139 348

8.6 Atomic Weight

223.00 amu145.00 amu

6.94 294

8.7 Atomic Volume

NA22.39 cm3/mol

1.39 71.07

8.8 Adjacent Atomic Numbers

8.8.1 Previous Element

8.8.2 Next Element

8.9 Valence Electron Potential

8.00 (-eV)44.10 (-eV)

8 392.42

8.10 Lattice Constant

NANA

228.58 891.25

8.11 Lattice Angles

Unknown

8.12 Lattice C/A Ratio

NANA

1.567 1.886

9 Mechanical

9.1 Density

9.1.1 Density At Room Temperature

1.87 g/cm³7.26 g/cm³

0.534 40.7

9.1.2 Density When Liquid (at m.p.)

NANA

0.512 20

9.2 Tensile Strength

NANA

2.5 11000

9.3 Viscosity

NANA

0.001526 0.001526

9.4 Vapor Pressure

9.4.1 Vapor Pressure at 1000 K

NANA

2.47E-11 121

9.4.2 Vapor Pressure at 2000 K

NANA

2.62E-10 774

9.5 Elasticity properties

9.5.1 Shear Modulus

NA18.00 GPa

1.3 222

9.5.2 Bulk Modulus

NA33.00 GPa

1.6 462

9.5.3 Young's Modulus

NA46.00 GPa

1.7 528

9.6 Poisson Ratio

NA0.28

0.032 0.47

9.7 Other Mechanical Properties

10 Magnetic

10.1 Magnetic Characteristics

10.1.1 Specific Gravity

NA7.26

0.53 4500

10.1.2 Magnetic Ordering

Paramagnetic

10.1.3 Permeability

NANA

1.25643E-06 0.0063

10.1.4 Susceptibility

NANA

-0.000166 200000

10.2 Electrical Properties

10.2.1 Electrical Property

Poor Conductor

Conductor

10.2.2 Resistivity

3.00 nΩ·m0.75 nΩ·m

0.18 961

10.2.3 Electrical Conductivity

0.03 10⁶/cm ΩNA

0.00666 0.63

10.2.4 Electron Affinity

NA50.00 kJ/mol

0 222.8

11 Thermal

11.1 Specific Heat

NA0.18 J/(kg K)

0.11 3.6

11.2 Molar Heat Capacity

NANA

16.443 62.7

11.3 Thermal Conductivity

15.00 W/m·K17.90 W/m·K

6.3 429

11.4 Critical Temperature

NANA

26.3 3223

11.5 Thermal Expansion

NA9.00 µm/(m·K)

4.5 97

11.6 Enthalpy

11.6.1 Enthalpy of Vaporization

NANA

7.32 799.1

11.6.2 Enthalpy of Fusion

NA7.50 kJ/mol

2.1 35.23

11.6.3 Enthalpy of Atomization

71.00 kJ/mol310.00 kJ/mol

61.5 837

11.7 Standard Molar Entropy

NANA

9.5 198.1

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