Ra Element

Radium

Periodic Table

Symbol

Group Number

2 16

Period Number

7 1

Block

s block

Element Family

Alkaline Earth

CAS Number

7440144 65

Space Group Name

Im_ 3m

Space Group Number

229.00 2

Facts

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.

Sources

Mining, Ores of metals

History

Who Discovered

Discovery

In 1898

Abundance

Abundance In Universe

0.00 % 40

Abundance In Sun

0.00 % 26

Abundance In Meteorites

Abundance In Earth's Crust

0.00 % 57

Abundance In Oceans

0.00 % 45

Abundance In Humans

0.00 % 23

Uses

Uses & Benefits

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

Industrial Uses

Medical Uses

Pharmaceutical Industry

Other Uses

Biological Properties

Toxicity

Highly Toxic

Present in Human Body

In Blood

0.00 Blood/mg dm-3 34

In Bone

0.00 p.p.m. 41

Physical

Melting Point

700.00 °C 59

Boiling Point

1,737.00 °C 56

Appearance

Physical State

Solid

Color

Silvery White

Luster

Metallic

Hardness

Mohs Hardness

1.00 22

Brinell Hardness

700.00 MPa 17

Vickers Hardness

140.00 MPa 59

Speed of Sound

3,150.00 m/s 37

Optical Properties

Refractive Index

1.00 48

Reflectivity

83.00 % 6

Allotropes

α Allotropes

β Allotropes

γ Allotropes

Chemical

Chemical Formula

Isotopes

Known Isotopes

33 6

Electronegativity

Pauling Electronegativity

0.90 50

Sanderson Electronegativity

0.89 45

Allred Rochow Electronegativity

0.97 39

Mulliken-Jaffe Electronegativity

0.92 48

Allen Electronegativity

0.89 60

Electropositivity

Pauling Electropositivity

3.10 5

Ionization Energies

1st Energy Level

509.30 kJ/mol 82

2nd Energy Level

979.00 kJ/mol 82

3rd Energy Level

509.30 kJ/mol 90

4th Energy Level

5,093.00 kJ/mol 27

5th Energy Level

5,090.00 kJ/mol 73

6th Energy Level

5,090.00 kJ/mol 85

7th Energy level

5,090.00 kJ/mol 77

8th Energy Level

5,090.00 kJ/mol 75

9th Energy Level

5,090.00 kJ/mol 76

10th Energy Level

5,090.00 kJ/mol 73

11th Energy Level

5,090.00 kJ/mol 78

12th Energy Level

5,090.00 kJ/mol 81

13th Energy Level

5,090.00 kJ/mol 71

14th Energy Level

5,090.00 kJ/mol 55

15th Energy Level

50,900.00 kJ/mol 71

16th Energy Level

50,900.00 kJ/mol 57

17th Energy Level

509.30 kJ/mol 86

18th Energy Level

5,090.00 kJ/mol 71

19th Energy Level

509.30 kJ/mol 85

20th Energy Level

509.00 kJ/mol 75

21st Energy Level

509.30 kJ/mol 85

22nd Energy Level

509.00 kJ/mol 69

23rd Energy Level

509.30 kJ/mol 81

24th Energy Level

509.30 kJ/mol 81

25th Energy Level

509.00 kJ/mol 73

26th Energy Level

509.30 kJ/mol 81

27th Energy Level

509.30 kJ/mol 76

28th Energy Level

509.30 kJ/mol 79

29th Energy Level

509.30 kJ/mol 82

30th Energy Level

509.00 kJ/mol 76

Electrochemical Equivalent

4.22 g/amp-hr 6

Electron Work Function

4.30 eV 25

Other Chemical Properties

Ionization, Radioactive Isotopes, Radioactivity

Atomic

Atomic Number

88 30

Electron Configuration

[Rn] 7s²

Crystal Structure

Body Centered Cubic (BCC)

Crystal Lattice

BCC-Crystal-Structure-.jpg#100

Atom

Number of Protons

88 30

Number of Neutrons

138 17

Number of Electrons

88 30

Radius of an Atom

Atomic Radius

215.00 pm 6

Covalent Radius

221.00 pm 3

Van der Waals Radius

283.00 pm 5

Atomic Weight

226.00 amu 26

Atomic Volume

45.20 cm3/mol 5

Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential

20.10 (-eV) 62

Lattice Constant

514.80 pm 15

Lattice Angles

π/2, π/2, π/2

Lattice C/A Ratio

1.57 41

Mechanical

Density

Density At Room Temperature

5.50 g/cm³ 73

Density When Liquid (at m.p.)

5.50 g/cm3 75

Tensile Strength

40.00 MPa 42

Viscosity

0.00 2

Vapor Pressure

Vapor Pressure at 1000 K

0.00 (Pa) 16

Vapor Pressure at 2000 K

0.00 (Pa) 33

Elasticity properties

Shear Modulus

25.00 GPa 38

Bulk Modulus

43.00 GPa 33

Young's Modulus

83.00 GPa 25

Poisson Ratio

0.31 13

Other Mechanical Properties

Magnetic

Magnetic Characteristics

Specific Gravity

5.00 72

Magnetic Ordering

Nonmagnetic

Permeability

0.00 H/m 9

Susceptibility

0.00 18

Electrical Properties

Electrical Property

Resistivity

100.00 nΩ·m 31

Electrical Conductivity

0.00 10⁶/cm Ω 70

Electron Affinity

0.90 kJ/mol 46

Thermal

Specific Heat

0.12 J/(kg K) 42

Molar Heat Capacity

20.05 J/mol·K 67

Thermal Conductivity

18.60 W/m·K 46

Critical Temperature

973.00 K 61

Thermal Expansion

8.50 µm/(m·K) 60

Enthalpy

Enthalpy of Vaporization

113.00 kJ/mol 77

Enthalpy of Fusion

8.60 kJ/mol 47

Enthalpy of Atomization

163.00 kJ/mol 63

Standard Molar Entropy

71.00 J/mol.K 14

Summary >>

<< Thermal

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