Radium

Roentgenium

Radium vs Roentgenium

Radium

Roentgenium

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1 Periodic Table

1.1 Symbol

1.2 Group Number

211

0 17

1.3 Period Number

2 7

1.4 Block

s block

d block

1.5 Element Family

Alkaline Earth

Unknown

1.6 CAS Number

744014454386242

7429905 54386242

1.7 Space Group Name

Im_ 3m

Not Available

1.8 Space Group Number

229.00194.00

11 229

2 Facts

2.1 Interesting Facts

Radium metal is the heaviest metal of Alkaline earth metals column.
Radium metal is highly radioactive and does not have any stable isotopes.

Not Available

2.2 Sources

Mining, Ores of metals

Synthetically Produced

2.3 History

2.3.1 Who Discovered

Not Available

Gesellschaft für Schwerionenforschung

2.3.2 Discovery

In 1898

In 1994

2.4 Abundance

2.4.1 Abundance In Universe

NANA

5E-09 0.11

2.4.2 Abundance In Sun

~-9999 %~-9999 %

1E-08 0.1

2.4.3 Abundance In Meteorites

NANA

1.7E-07 22

2.4.4 Abundance In Earth's Crust

0.00 %NA

9.9E-12 8.1

2.4.5 Abundance In Oceans

0.00 %NA

2E-23 1.1

2.4.6 Abundance In Humans

0.00 %NA

1E-13 1.4

3 Uses

3.1 Uses & Benefits

It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
It is used in luminous paints.

Currently known uses of Roentgenium metal are limited to research purpose only.

3.1.1 Industrial Uses

3.1.2 Medical Uses

Pharmaceutical Industry

3.1.3 Other Uses

Research Purposes

3.2 Biological Properties

3.2.1 Toxicity

Highly Toxic

Unknown

3.2.2 Present in Human Body

✔ ✘

3.2.3 In Blood

NA0.00 Blood/mg dm-3

0 1970

3.2.4 In Bone

NA0.00 p.p.m.

0 170000

4 Physical

4.1 Melting Point

700.00 °CNA

27 3410

4.2 Boiling Point

1,737.00 °CNA

147 5660

4.3 Appearance

4.3.1 Physical State

Solid

4.3.2 Color

Silvery White

Silver

4.3.3 Luster

Metallic

Unknown Luster

4.4 Hardness

4.4.1 Mohs Hardness

NANA

0.2 8.5

4.4.2 Brinell Hardness

NANA

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

331

0 38

5.3 Electronegativity

5.3.1 Pauling Electronegativity

0.90NA

0.7 2.54

5.3.2 Sanderson Electronegativity

NANA

0.22 2.56

5.3.3 Allred Rochow Electronegativity

0.97NA

0.86 1.82

5.3.4 Mulliken-Jaffe Electronegativity

0.92NA

0.62 2.48

5.3.5 Allen Electronegativity

0.89NA

0.659 2.7

5.4 Electropositivity

5.4.1 Pauling Electropositivity

3.10NA

1.46 3.3

5.5 Ionization Energies

5.5.1 1st Energy Level

509.30 kJ/mol1,022.70 kJ/mol

375.7 26130

5.5.2 2nd Energy Level

979.00 kJ/mol2,074.40 kJ/mol

710.2162 28750

5.5.3 3rd Energy Level

NA3,077.90 kJ/mol

1600 34230

5.5.4 4th Energy Level

NA4,052.40 kJ/mol

2780 37066

5.5.5 5th Energy Level

NA5,306.70 kJ/mol

4305.2 97510

5.5.6 6th Energy Level

NANA

5715.8 105800

5.5.7 7th Energy level

NANA

7226.8 114300

5.5.8 8th Energy Level

NANA

8857.4 125300

5.5.9 9th Energy Level

NANA

14110 134700

5.5.10 10th Energy Level

NANA

17100 144300

5.5.11 11th Energy Level

NANA

19900 169988

5.5.12 12th Energy Level

NANA

22219 189368

5.5.13 13th Energy Level

NANA

26930 76015

5.5.14 14th Energy Level

NANA

29196 86450

5.5.15 15th Energy Level

NANA

41987 97510

5.5.16 16th Energy Level

NANA

47206 109480

5.5.17 17th Energy Level

NANA

52737 122200

5.5.18 18th Energy Level

NANA

58570 134810

5.5.19 19th Energy Level

NANA

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

4.22 g/amp-hrNA

0.16812 8.3209

5.7 Electron Work Function

NANA

2.14 5.65

5.8 Other Chemical Properties

Ionization, Radioactive Isotopes, Radioactivity

6 Atomic

6.1 Atomic Number

88111

3 117

6.2 Electron Configuration

[Rn] 7s²

[Rn] 5f¹⁴ 6d⁹ 7s²

6.3 Crystal Structure

Body Centered Cubic (BCC)

6.3.1 Crystal Lattice

6.4 Atom

6.4.1 Number of Protons

88111

3 117

6.4.2 Number of Neutrons

138161

4 184

6.4.3 Number of Electrons

88111

3 117

6.5 Radius of an Atom

6.5.1 Atomic Radius

NANA

112 265

6.5.2 Covalent Radius

221.00 pmNA

96 260

6.5.3 Van der Waals Radius

283.00 pmNA

139 348

6.6 Atomic Weight

226.00 amu281.00 amu

6.94 294

6.7 Atomic Volume

45.20 cm3/molNA

1.39 71.07

6.8 Adjacent Atomic Numbers

6.8.1 Previous Element

6.8.2 Next Element

6.9 Valence Electron Potential

20.10 (-eV)NA

8 392.42

6.10 Lattice Constant

514.80 pmNA

228.58 891.25

6.11 Lattice Angles

π/2, π/2, π/2

6.12 Lattice C/A Ratio

NANA

1.567 1.886

7 Mechanical

7.1 Density

7.1.1 Density At Room Temperature

5.50 g/cm³28.70 g/cm³

0.534 40.7

7.1.2 Density When Liquid (at m.p.)

NANA

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

NANA

2.47E-11 121

7.4.2 Vapor Pressure at 2000 K

NANA

2.62E-10 774

7.5 Elasticity properties

7.5.1 Shear Modulus

NANA

1.3 222

7.5.2 Bulk Modulus

NANA

1.6 462

7.5.3 Young's Modulus

NANA

1.7 528

7.6 Poisson Ratio

NANA

0.032 0.47

7.7 Other Mechanical Properties

Unknown

8 Magnetic

8.1 Magnetic Characteristics

8.1.1 Specific Gravity

5.00NA

0.53 4500

8.1.2 Magnetic Ordering

Nonmagnetic

Unknown

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

Unknown

8.2.2 Resistivity

100.00 nΩ·mNA

0.18 961

8.2.3 Electrical Conductivity

NANA

0.00666 0.63

8.2.4 Electron Affinity

NANA

0 222.8

9 Thermal

9.1 Specific Heat

0.12 J/(kg K)NA

0.11 3.6

9.2 Molar Heat Capacity

NANA

16.443 62.7

9.3 Thermal Conductivity

18.60 W/m·KNA

6.3 429

9.4 Critical Temperature

NANA

26.3 3223

9.5 Thermal Expansion

NANA

4.5 97

9.6 Enthalpy

9.6.1 Enthalpy of Vaporization

NANA

7.32 799.1

9.6.2 Enthalpy of Fusion

NANA

2.1 35.23

9.6.3 Enthalpy of Atomization

163.00 kJ/molNA

61.5 837

9.7 Standard Molar Entropy

71.00 J/mol.KNA

9.5 198.1

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