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Curium vs Potassium


Potassium vs Curium


Periodic Table

Symbol
Cm   
K   

Group Number
Not Available   
1   
17

Period Number
7   
4   

Block
f block   
s block   

Element Family
Actinide   
Alkali   

CAS Number
7440519   
36
7440097   
99+

Space Group Name
Not Available   
Im_ 3m   

Space Group Number
Not Available   
229.00   
1

Facts

Interesting Facts
  • Curium metal does not occur free in nature.
  • Curium metal is a synthetically produced metal.
  
  • In the list of most abundant element Potassium is ranked 7th.
  • Potassium can easily be sliced (chopped) down using knife.
  

Sources
Bombarding Plutonium with Helium Ions   
Found in Minerals, Mining   

History
  
  

Who Discovered
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso   
Humphry Davy   

Discovery
In 1944   
In 1807   

Abundance
  
  

Abundance In Universe
Not Available   
3 * 10-4 %   
9

Abundance In Sun
~-9999 %   
~0.0004 %   
9

Abundance In Meteorites
Not Available   
0.07 %   
9

Abundance In Earth's Crust
Not Available   
1.50 %   
6

Abundance In Oceans
Not Available   
0.04 %   
3

Abundance In Humans
Not Available   
0.20 %   
2

Uses

Uses & Benefits
  • Curium metal is used to provide power to electrical equipment for space missions.
  
  • Potassium’s compounds are in high demand for their application in Fertilizer manufacturing.
  • Potassium carbonate is used in glass manufacturing and Potassium carbonate in manufacturing detergent and body wash.
  

Industrial Uses
NA   
Ammunition Industry, Chemical Industry   

Medical Uses
NA   
Pharmaceutical Industry   

Other Uses
Research Purposes   
NA   

Biological Properties
  
  

Toxicity
Unknown   
Toxic   

Present in Human Body
No   
Yes   

In Blood
0.00 Blood/mg dm-3   
37
1,620.00 Blood/mg dm-3   
2

In Bone
0.00 p.p.m.   
36
2,100.00 p.p.m.   
3

Physical Properties

Melting Point
1,340.00 °C   
34
63.65 °C   
99+

Boiling Point
3,110.00 °C   
30
774.00 °C   
99+

Appearance
  
  

Physical State
Solid   
Solid   

Color
Silver   
Silvery Gray   

Luster
Metallic   
NA   

Hardness
  
  

Mohs Hardness
Not Available   
0.40   
23

Brinell Hardness
Not Available   
0.36 MPa   
99+

Speed of Sound
Not Available   
2,000.00 m/s   
99+

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
Cm   
K   

Isotopes
  
  

Known Isotopes
15   
24
20   
19

Electronegativity
  
  

Pauling Electronegativity
1.30   
32
0.82   
99+

Sanderson Electronegativity
Not Available   
0.45   
31

Allred Rochow Electronegativity
1.20   
27
0.91   
39

Mulliken-Jaffe Electronegativity
Not Available   
0.73   
23

Allen Electronegativity
Not Available   
0.73   
99+

Electropositivity
  
  

Pauling Electropositivity
2.70   
22
3.18   
3

Ionization Energies
  
  

1st Energy Level
581.00 kJ/mol   
99+
418.80 kJ/mol   
99+

2nd Energy Level
1,196.00 kJ/mol   
99+
3,052.00 kJ/mol   
5

3rd Energy Level
2,026.00 kJ/mol   
99+
4,420.00 kJ/mol   
8

4th Energy Level
3,550.00 kJ/mol   
99+
5,877.00 kJ/mol   
9

5th Energy Level
Not Available   
7,975.00 kJ/mol   
8

6th Energy Level
Not Available   
9,590.00 kJ/mol   
13

7th Energy level
Not Available   
11,343.00 kJ/mol   
17

8th Energy Level
Not Available   
14,944.00 kJ/mol   
13

9th Energy Level
Not Available   
16,963.70 kJ/mol   
15

10th Energy Level
Not Available   
48,610.00 kJ/mol   
3

11th Energy Level
Not Available   
54,490.00 kJ/mol   
4

12th Energy Level
Not Available   
60,730.00 kJ/mol   
4

13th Energy Level
Not Available   
68,950.00 kJ/mol   
4

14th Energy Level
Not Available   
75,900.00 kJ/mol   
5

15th Energy Level
Not Available   
83,080.00 kJ/mol   
6

16th Energy Level
Not Available   
93,400.00 kJ/mol   
7

17th Energy Level
Not Available   
99,710.00 kJ/mol   
8

Electrochemical Equivalent
3.07 g/amp-hr   
16
1.46 g/amp-hr   
99+

Electron Work Function
Not Available   
2.30 eV   
99+

Other Chemical Properties
Ionization, Radioactive Isotopes   
Chemical Stability, Flammability, Ionization, Solubility   

Atomic Properties

Atomic Number
96   
22
19   
99+

Electron Configuration
[Rn] 5f7 6d1 7s2   
[Ar] 4s1   

Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Body Centered Cubic (BCC)   

Crystal Lattice
DHCP-Crystal-Structure-of-Curium.jpg#100   
BCC-Crystal-Structure-.jpg#100   

Atom
  
  

Number of Protons
96   
22
19   
99+

Number of Neutrons
151   
10
20   
99+

Number of Electrons
96   
22
19   
99+

Radius of an Atom
  
  

Atomic Radius
174.00 pm   
20
227.00 pm   
3

Covalent Radius
169.00 pm   
26
203.00 pm   
9

Van der Waals Radius
200.00 pm   
28
275.00 pm   
5

Atomic Weight
247.00 amu   
18
39.10 amu   
99+

Atomic Volume
18.28 cm3/mol   
26
45.46 cm3/mol   
3

Adjacent Atomic Numbers
  
  

Previous Element
Americium
  
Aluminium
  

Next Element
Berkelium
  
Calcium
  

Valence Electron Potential
44.50 (-eV)   
38
10.40 (-eV)   
99+

Lattice Constant
Not Available   
532.80 pm   
12

Lattice Angles
NA   
π/2, π/2, π/2   

Lattice C/A Ratio
Not Available   
Not Available   

Mechanical Properties

Density
  
  

Density At Room Temperature
13.51 g/cm3   
25
0.86 g/cm3   
99+

Density When Liquid (at m.p.)
13.85 g/cm3   
10
0.83 g/cm3   
99+

Tensile Strength
Not Available   
Not Available   

Viscosity
Not Available   
Not Available   

Vapor Pressure
  
  

Elasticity properties
  
  

Shear Modulus
Not Available   
1.30 GPa   
99+

Bulk Modulus
Not Available   
3.10 GPa   
99+

Young's Modulus
Not Available   
3.53 GPa   
99+

Poisson Ratio
Not Available   
Not Available   

Other Mechanical Properties
Unknown   
NA   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
13.51   
17
0.86   
99+

Magnetic Ordering
Antiferromagnetic   
Paramagnetic   

Electrical Properties
  
  

Electrical Property
Unknown   
Conductor   

Resistivity
1.25 nΩ·m   
99+
72.00 nΩ·m   
37

Electrical Conductivity
Not Available   
0.14 106/cm Ω   
14

Electron Affinity
Not Available   
48.40 kJ/mol   
22

Thermal Properties

Specific Heat
Not Available   
0.75 J/(kg K)   
6

Molar Heat Capacity
Not Available   
29.60 J/mol·K   
6

Thermal Conductivity
Not Available   
102.50 W/m·K   
15

Critical Temperature
Not Available   
2,223.00 K   
3

Thermal Expansion
Not Available   
83.30 µm/(m·K)   
3

Enthalpy
  
  

Enthalpy of Vaporization
Not Available   
77.50 kJ/mol   
99+

Enthalpy of Fusion
15.00 kJ/mol   
21
2.32 kJ/mol   
99+

Enthalpy of Atomization
Not Available   
89.50 kJ/mol   
99+

Standard Molar Entropy
Not Available   
64.70 J/mol.K   
18

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