Francium

Scandium

Francium Scandium Comparison

Francium

Scandium

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1 Periodic Table

1.1 Symbol

1.2 Group Number

0 17

1.3 Period Number

2 7

1.4 Block

s block

d block

1.5 Element Family

Alkali

Transition Metal

1.6 CAS Number

74407357440202

7429905 54386242

1.7 Space Group Name

Not Available

P63/mmc

1.8 Space Group Number

NA194.00

11 229

2 Facts

2.1 Interesting Facts

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

Scandium is known as one of the rare earth elements.
Scandium metal found in rare minerals called Wolframite .

2.2 Sources

Formed by Decay Process, Mining

Found in Minerals, Mining, Ores of metals, Ores of Minerals

2.3 History

2.3.1 Who Discovered

Marguerite Perey

Lars Fredrik Nilson

2.3.2 Discovery

In 1939

In 1879

2.4 Abundance

2.4.1 Abundance In Universe

NA3 * 10^-6 %

5E-09 0.11

2.4.2 Abundance In Sun

~-9999 %~0.000004 %

1E-08 0.1

2.4.3 Abundance In Meteorites

NA0.00 %

1.7E-07 22

2.4.4 Abundance In Earth's Crust

NA0.00 %

9.9E-12 8.1

2.4.5 Abundance In Oceans

NA0.00 %

2E-23 1.1

2.4.6 Abundance In Humans

NANA

1E-13 1.4

3 Uses

3.1 Uses & Benefits

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

Uses of Scandium are limited to research purpose only. However, it has very low density and higher melting point.
Its compounds like scandium iodide is used in mercury vapor lamps to produce very bright white light.

3.1.1 Industrial Uses

Electrical Industry, Electronic Industry

3.1.2 Medical Uses

3.1.3 Other Uses

Alloys

3.2 Biological Properties

3.2.1 Toxicity

Non Toxic

3.2.2 Present in Human Body

✔ ✘

3.2.3 In Blood

0.00 Blood/mg dm-30.01 Blood/mg dm-3

0 1970

3.2.4 In Bone

0.00 p.p.m.0.00 p.p.m.

0 170000

4 Physical

4.1 Melting Point

27.00 °C1,539.00 °C

27 3410

4.2 Boiling Point

677.00 °C2,832.00 °C

147 5660

4.3 Appearance

4.3.1 Physical State

Solid

4.3.2 Color

Silvery White

4.3.3 Luster

Lustrous

4.4 Hardness

4.4.1 Mohs Hardness

NANA

0.2 8.5

4.4.2 Brinell Hardness

NA750.00 MPa

0.14 3490

4.4.3 Vickers Hardness

NANA

121 3430

4.5 Speed of Sound

NANA

818 16200

4.6 Optical Properties

4.6.1 Refractive Index

NANA

1.000933 1.7229

4.6.2 Reflectivity

NANA

58 97

4.7 Allotropes

✔ ✘

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

5.2 Isotopes

5.2.1 Known Isotopes

3313

0 38

5.3 Electronegativity

5.3.1 Pauling Electronegativity

0.701.36

0.7 2.54

5.3.2 Sanderson Electronegativity

NA1.02

0.22 2.56

5.3.3 Allred Rochow Electronegativity

0.861.20

0.86 1.82

5.3.4 Mulliken-Jaffe Electronegativity

0.68NA

0.62 2.48

5.3.5 Allen Electronegativity

0.671.19

0.659 2.7

5.4 Electropositivity

5.4.1 Pauling Electropositivity

3.302.64

1.46 3.3

5.5 Ionization Energies

5.5.1 1st Energy Level

380.00 kJ/mol633.10 kJ/mol

375.7 26130

5.5.2 2nd Energy Level

NA1,235.00 kJ/mol

710.2162 28750

5.5.3 3rd Energy Level

NA2,388.60 kJ/mol

1600 34230

5.5.4 4th Energy Level

NA7,090.60 kJ/mol

2780 37066

5.5.5 5th Energy Level

NA8,843.00 kJ/mol

4305.2 97510

5.5.6 6th Energy Level

NA10,679.00 kJ/mol

5715.8 105800

5.5.7 7th Energy level

NA13,310.00 kJ/mol

7226.8 114300

5.5.8 8th Energy Level

NA15,250.00 kJ/mol

8857.4 125300

5.5.9 9th Energy Level

NA17,370.00 kJ/mol

14110 134700

5.5.10 10th Energy Level

NA21,726.00 kJ/mol

17100 144300

5.5.11 11th Energy Level

NA24,102.00 kJ/mol

19900 169988

5.5.12 12th Energy Level

NA66,320.00 kJ/mol

22219 189368

5.5.13 13th Energy Level

NA73,010.00 kJ/mol

26930 76015

5.5.14 14th Energy Level

NA80,160.00 kJ/mol

29196 86450

5.5.15 15th Energy Level

NA89,490.00 kJ/mol

41987 97510

5.5.16 16th Energy Level

NA97,400.00 kJ/mol

47206 109480

5.5.17 17th Energy Level

NA105,600.00 kJ/mol

52737 122200

5.5.18 18th Energy Level

NA117,000.00 kJ/mol

58570 134810

5.5.19 19th Energy Level

NA124,270.00 kJ/mol

64702 148700

5.5.20 20th Energy Level

NANA

80400 171200

5.5.21 21st Energy Level

NANA

87000 179100

5.5.22 22nd Energy Level

NANA

93400 184900

5.5.23 23rd Energy Level

NANA

98420 198800

5.5.24 24th Energy Level

NANA

104400 195200

5.5.25 25th Energy Level

NANA

121900 121900

5.5.26 26th Energy Level

NANA

127700 127700

5.5.27 27th Energy Level

NANA

133800 133800

5.5.28 28th Energy Level

NANA

139800 139800

5.5.29 29th Energy Level

NANA

148100 148100

5.5.30 30th Energy Level

NANA

154500 154500

5.6 Electrochemical Equivalent

8.32 g/amp-hr0.56 g/amp-hr

0.16812 8.3209

5.7 Electron Work Function

NA3.50 eV

2.14 5.65

5.8 Other Chemical Properties

Ionization, Radioactive Isotopes, Radioactivity, Solubility

Corrosion, Flammable, Ionization, Radioactive Isotopes, Solubility

6 Atomic

6.1 Atomic Number

8721

3 117

6.2 Electron Configuration

[Rn] 7s¹

[Ar] 3d¹ 4s²

6.3 Crystal Structure

Body Centered Cubic (BCC)

Hexagonal Close Packed (HCP)

6.3.1 Crystal Lattice

6.4 Atom

6.4.1 Number of Protons

8721

3 117

6.4.2 Number of Neutrons

13624

4 184

6.4.3 Number of Electrons

8721

3 117

6.5 Radius of an Atom

6.5.1 Atomic Radius

NA162.00 pm

112 265

6.5.2 Covalent Radius

260.00 pm170.00 pm

96 260

6.5.3 Van der Waals Radius

348.00 pm211.00 pm

139 348

6.6 Atomic Weight

223.00 amu44.96 amu

6.94 294

6.7 Atomic Volume

NA15.00 cm3/mol

1.39 71.07

6.8 Adjacent Atomic Numbers

6.8.1 Previous Element

6.8.2 Next Element

6.9 Valence Electron Potential

8.00 (-eV)58.00 (-eV)

8 392.42

6.10 Lattice Constant

NA330.90 pm

228.58 891.25

6.11 Lattice Angles

π/2, π/2, 2 π/3

6.12 Lattice C/A Ratio

NA1.59

1.567 1.886

7 Mechanical

7.1 Density

7.1.1 Density At Room Temperature

1.87 g/cm³2.99 g/cm³

0.534 40.7

7.1.2 Density When Liquid (at m.p.)

NA2.80 g/cm3

0.512 20

7.2 Tensile Strength

NANA

2.5 11000

7.3 Viscosity

NANA

0.001526 0.001526

7.4 Vapor Pressure

7.4.1 Vapor Pressure at 1000 K

NA0.00 (Pa)

2.47E-11 121

7.4.2 Vapor Pressure at 2000 K

NA91.30 (Pa)

2.62E-10 774

7.5 Elasticity properties

7.5.1 Shear Modulus

NA29.10 GPa

1.3 222

7.5.2 Bulk Modulus

NA56.60 GPa

1.6 462

7.5.3 Young's Modulus

NA74.40 GPa

1.7 528

7.6 Poisson Ratio

NA0.28

0.032 0.47

7.7 Other Mechanical Properties

8 Magnetic

8.1 Magnetic Characteristics

8.1.1 Specific Gravity

NA2.99

0.53 4500

8.1.2 Magnetic Ordering

Paramagnetic

8.1.3 Permeability

NANA

1.25643E-06 0.0063

8.1.4 Susceptibility

NANA

-0.000166 200000

8.2 Electrical Properties

8.2.1 Electrical Property

Poor Conductor

Conductor

8.2.2 Resistivity

3.00 nΩ·m562.00 nΩ·m

0.18 961

8.2.3 Electrical Conductivity

0.03 10⁶/cm Ω0.02 10⁶/cm Ω

0.00666 0.63

8.2.4 Electron Affinity

NA18.10 kJ/mol

0 222.8

9 Thermal

9.1 Specific Heat

NA0.60 J/(kg K)

0.11 3.6

9.2 Molar Heat Capacity

NA25.52 J/mol·K

16.443 62.7

9.3 Thermal Conductivity

15.00 W/m·K15.80 W/m·K

6.3 429

9.4 Critical Temperature

NANA

26.3 3223

9.5 Thermal Expansion

NA10.20 µm/(m·K)

4.5 97

9.6 Enthalpy

9.6.1 Enthalpy of Vaporization

NA314.20 kJ/mol

7.32 799.1

9.6.2 Enthalpy of Fusion

NA14.10 kJ/mol

2.1 35.23

9.6.3 Enthalpy of Atomization

71.00 kJ/mol343.00 kJ/mol

61.5 837

9.7 Standard Molar Entropy

NA34.60 J/mol.K

9.5 198.1

Compare All Metals

Francium vs Einsteinium

Francium vs Actinium

Francium vs Neptunium

All Metals