Sodium vs Erbium
Periodic Table
Symbol
Na
Er
Group Number
1
17
Not Available
Period Number
3
6
Block
s block
f block
Element Family
Alkali
Lanthanide
CAS Number
7440235
99+
7440520
35
Space Group Name
Im_ 3m
P63/mmc
Space Group Number
229.00
1
194.00
5
Facts
Interesting Facts
- 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).
- Erbium metal is used as alloyed with Vanadium to make it softer.
- Recent studies shows that it is helpful for metabolism.
Sources
By Electrolysis Process, Mining
Mining
History
Who Discovered
Humphry Davy
Carl Gustaf Mosander
Discovery
In 1807
In 1842
Abundance
Abundance In Universe
2 * 10-3 %
6
2 * 10-7 %
22
Abundance In Sun
~0.004 %
6
~0.0000001 %
26
Abundance In Meteorites
0.55 %
6
0.00 %
36
Abundance In Earth's Crust
2.30 %
5
0.00 %
32
Abundance In Oceans
1.10 %
1
0.00 %
36
Abundance In Humans
0.14 %
3
Not Available
Uses
Uses & Benefits
- In some nuclear reactors sodium is used as a heat exchanger.
- Compound of Sodium metals called Salt (Sodium chloride) is used in Food.
- It has a tendency to get tarnished in the open air, but when alloyed with elements like erbium, vanadium, its hardness levels decreases.
- Its compounds like Erbium oxide is used in safety glasses of welders and metal workers.
Industrial Uses
Electrical Industry, Electronic Industry
Chemical Industry
Medical Uses
Pharmaceutical Industry
NA
Other Uses
Alloys
Alloys
Biological Properties
Toxicity
Toxic
Mildly Toxic
Present in Human Body
Yes
No
In Blood
1,970.00 Blood/mg dm-3
1
Not Available
In Bone
10,000.00 p.p.m.
2
Not Available
Physical Properties
Melting Point
97.72 °C
99+
1,522.00 °C
28
Boiling Point
883.00 °C
99+
2,510.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Silvery White
Silvery White
Luster
Metallic
Lustrous
Hardness
Mohs Hardness
0.50
22
Not Available
Brinell Hardness
0.69 MPa
99+
814.00 MPa
11
Vickers Hardness
Not Available
589.00 MPa
19
Speed of Sound
3,200.00 m/s
24
2,830.00 m/s
28
Optical Properties
Allotropes
No
No
α Allotropes
Not Available
Not Available
β Allotropes
Not Available
Not Available
γ Allotropes
Not Available
Not Available
Chemical Properties
Chemical Formula
Na
Er
Isotopes
Known Isotopes
17
22
31
8
Electronegativity
Pauling Electronegativity
0.93
99+
1.24
36
Sanderson Electronegativity
0.56
30
Not Available
Allred Rochow Electronegativity
1.01
35
1.11
29
Mulliken-Jaffe Electronegativity
0.91
21
Not Available
Allen Electronegativity
0.87
99+
Not Available
Electropositivity
Pauling Electropositivity
3.07
6
2.76
18
Ionization Energies
1st Energy Level
495.80 kJ/mol
99+
589.30 kJ/mol
99+
2nd Energy Level
4,562.00 kJ/mol
4
1,150.00 kJ/mol
99+
3rd Energy Level
6,910.30 kJ/mol
6
2,194.00 kJ/mol
99+
4th Energy Level
9,543.00 kJ/mol
5
4,120.00 kJ/mol
33
5th Energy Level
13,354.00 kJ/mol
4
Not Available
6th Energy Level
16,613.00 kJ/mol
4
Not Available
7th Energy level
20,117.00 kJ/mol
4
Not Available
8th Energy Level
25,496.00 kJ/mol
4
Not Available
9th Energy Level
28,932.00 kJ/mol
4
Not Available
10th Energy Level
141,362.00 kJ/mol
2
Not Available
11th Energy Level
159,076.00 kJ/mol
2
Not Available
Electrochemical Equivalent
0.86 g/amp-hr
99+
2.08 g/amp-hr
28
Electron Work Function
2.75 eV
40
Not Available
Other Chemical Properties
Chemical Stability, Corrosion, Flammability, Ionization, Solubility
Ionization, Radioactive Isotopes, Solubility
Atomic Properties
Atomic Number
11
99+
68
99+
Electron Configuration
[Ne] 3s1
[Xe] 4f12 6s2
Crystal Structure
Body Centered Cubic (BCC)
Hexagonal Close Packed (HCP)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
HCP-Crystal-Structure-of-Erbium.jpg#100
Atom
Number of Protons
11
99+
68
99+
Number of Neutrons
12
99+
99
33
Number of Electrons
11
99+
68
99+
Radius of an Atom
Atomic Radius
186.00 pm
9
176.00 pm
18
Covalent Radius
166.00 pm
27
189.00 pm
19
Van der Waals Radius
227.00 pm
21
Not Available
Atomic Weight
22.99 amu
99+
167.26 amu
99+
Atomic Volume
23.70 cm3/mol
10
18.40 cm3/mol
25
Adjacent Atomic Numbers
Valence Electron Potential
14.10 (-eV)
99+
49.00 (-eV)
29
Lattice Constant
429.06 pm
19
355.88 pm
39
Lattice Angles
π/2, π/2, π/2
π/2, π/2, 2 π/3
Lattice C/A Ratio
Not Available
1.57
17
Mechanical Properties
Density
Density At Room Temperature
0.97 g/cm3
99+
9.07 g/cm3
99+
Density When Liquid (at m.p.)
0.93 g/cm3
99+
8.86 g/cm3
23
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
Not Available
0.00 (Pa)
20
Elasticity properties
Shear Modulus
3.30 GPa
99+
28.30 GPa
25
Bulk Modulus
6.30 GPa
99+
44.40 GPa
27
Young's Modulus
10.00 GPa
99+
69.90 GPa
29
Poisson Ratio
Not Available
0.24
28
Other Mechanical Properties
NA
Malleable
Magnetic Properties
Magnetic Characteristics
Specific Gravity
0.97
99+
9.07
32
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
47.70 nΩ·m
99+
0.86 nΩ·m
99+
Electrical Conductivity
0.21 106/cm Ω
9
0.01 106/cm Ω
99+
Electron Affinity
52.80 kJ/mol
19
50.00 kJ/mol
21
Thermal Properties
Specific Heat
1.23 J/(kg K)
3
0.17 J/(kg K)
34
Molar Heat Capacity
28.23 J/mol·K
10
28.12 J/mol·K
11
Thermal Conductivity
142.00 W/m·K
11
14.50 W/m·K
99+
Critical Temperature
2,573.00 K
2
Not Available
Thermal Expansion
71.00 µm/(m·K)
4
12.20 µm/(m·K)
31
Enthalpy
Enthalpy of Vaporization
89.04 kJ/mol
99+
261.00 kJ/mol
35
Enthalpy of Fusion
2.59 kJ/mol
99+
17.20 kJ/mol
15
Enthalpy of Atomization
108.40 kJ/mol
99+
314.00 kJ/mol
33
Standard Molar Entropy
51.30 J/mol.K
28
73.10 J/mol.K
11
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