Symbol
Th
  
Na
  
Period Number
7
  
3
  
Block
f block
  
s block
  
Element Family
Actinide
  
Alkali
  
Space Group Name
P63/mmc
  
Im_ 3m
  
Interesting Facts
- Thorium metal is used as an alternate option over Uranium for nuclear fuel.
- Thorium metals appearance (silvery white, soft) is somewhat similar to Lead metal.
  
- At room temperature Sodium metal is very soft as it can be chopped down into pieces with butter knife.
- The most common compound of Sodium is NaCl (Salt).
  
Sources
Found in Minerals, Mining
  
By Electrolysis Process, Mining
  
History
  
  
Who Discovered
Jöns Jakob Berzelius
  
Humphry Davy
  
Discovery
In 1829
  
In 1807
  
Abundance
  
  
Abundance In Earth's Crust
Abundance In Humans
Not Available
  
Uses & Benefits
- Thorium metal is used as an allying agent for Magnesium, It imparts greater strength and resistance to temperature.
-
compound of this metal Thorium oxide is used as an industrial catalyst.
  
- In some nuclear reactors sodium is used as a heat exchanger.
- Compound of Sodium metals called Salt (Sodium chloride) is used in Food.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry
  
Electrical Industry, Electronic Industry
  
Medical Uses
Dentistry, Surgical Instruments Manufacturing
  
Pharmaceutical Industry
  
Other Uses
Alloys, Jewellery, Sculptures, Statues
  
Alloys
  
Biological Properties
  
  
Toxicity
Non Toxic
  
Toxic
  
Present in Human Body
Yes
  
Yes
  
In Blood
0.00 Blood/mg dm-3
  
33
1,970.00 Blood/mg dm-3
  
1
In Bone
0.02 p.p.m.
  
29
10,000.00 p.p.m.
  
2
Melting Point
1,750.00 °C
  
17
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Silver
  
Silvery White
  
Luster
NA
  
Metallic
  
Hardness
  
  
Vickers Hardness
Not Available
  
Speed of Sound
2,490.00 m/s
  
36
3,200.00 m/s
  
24
Optical Properties
  
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Th
  
Na
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Not Available
  
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
  
Allen Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
587.00 kJ/mol
  
99+
495.80 kJ/mol
  
99+
2nd Energy Level
1,110.00 kJ/mol
  
99+
4,562.00 kJ/mol
  
4
3rd Energy Level
1,978.00 kJ/mol
  
99+
6,910.30 kJ/mol
  
6
4th Energy Level
2,780.00 kJ/mol
  
99+
9,543.00 kJ/mol
  
5
5th Energy Level
Not Available
  
13,354.00 kJ/mol
  
4
6th Energy Level
Not Available
  
16,613.00 kJ/mol
  
4
7th Energy level
Not Available
  
20,117.00 kJ/mol
  
4
8th Energy Level
Not Available
  
25,496.00 kJ/mol
  
4
9th Energy Level
Not Available
  
28,932.00 kJ/mol
  
4
10th Energy Level
Not Available
  
141,362.00 kJ/mol
  
2
11th Energy Level
Not Available
  
159,076.00 kJ/mol
  
2
Electrochemical Equivalent
2.16 g/amp-hr
  
24
0.86 g/amp-hr
  
99+
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Radioactivity
  
Chemical Stability, Corrosion, Flammability, Ionization, Solubility
  
Electron Configuration
[Rn] 6d2 7s2
  
[Ne] 3s1
  
Crystal Structure
Face Centered Cubic (FCC)
  
Body Centered Cubic (BCC)
  
Crystal Lattice
FCC-Crystal-Structure-of-Thorium.jpg#100
  
BCC-Crystal-Structure-.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Atomic Volume
19.90 cm3/mol
  
20
23.70 cm3/mol
  
10
Adjacent Atomic Numbers
  
  
Valence Electron Potential
59.30 (-eV)
  
23
14.10 (-eV)
  
99+
Lattice Angles
π/2, π/2, π/2
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Density
  
  
Density At Room Temperature
11.72 g/cm3
  
32
0.97 g/cm3
  
99+
Density When Liquid (at m.p.)
Not Available
  
0.93 g/cm3
  
99+
Tensile Strength
Not Available
  
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available
  
Elasticity properties
  
  
Poisson Ratio
Not Available
  
Other Mechanical Properties
Ductile
  
NA
  
Magnetic Characteristics
  
  
Magnetic Ordering
Paramagnetic
  
Paramagnetic
  
Electrical Properties
  
  
Electrical Property
Superconductor
  
Conductor
  
Resistivity
157.00 nΩ·m
  
22
47.70 nΩ·m
  
99+
Electrical Conductivity
0.07 106/cm Ω
  
31
0.21 106/cm Ω
  
9
Electron Affinity
Not Available
  
52.80 kJ/mol
  
19
Specific Heat
0.12 J/(kg K)
  
40
1.23 J/(kg K)
  
3
Molar Heat Capacity
26.23 J/mol·K
  
30
28.23 J/mol·K
  
10
Thermal Conductivity
54.00 W/m·K
  
28
142.00 W/m·K
  
11
Critical Temperature
Not Available
  
Thermal Expansion
11.00 µm/(m·K)
  
36
71.00 µm/(m·K)
  
4
Enthalpy
  
  
Enthalpy of Vaporization
429.00 kJ/mol
  
15
89.04 kJ/mol
  
99+
Enthalpy of Fusion
15.48 kJ/mol
  
19
2.59 kJ/mol
  
99+
Enthalpy of Atomization
468.60 kJ/mol
  
15
108.40 kJ/mol
  
99+
Standard Molar Entropy
27.30 J/mol.K
  
99+
51.30 J/mol.K
  
28