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Actinium vs Gallium

Actinium
Gallium
Gallium vs Actinium


Periodic Table
Symbol
Ac   
Ga   
Group Number
Not Available   
13   
5
Period Number
7   
4   
Block
f block   
p block   
Element Family
Actinide   
Post-​Transition   
CAS Number
7440348   
99+
7440553   
32
Space Group Name
Fm_ 3m   
Cmca   
Space Group Number
225.00   
2
64.00   
9
Facts
Interesting Facts
Not Available   
  • A gram of Gallium metal can be bought for only three dollars.
  • Gallium metal found in ores of following things Coal, Bauxite, Diaspore, Sphalerite, Germanite and Zinc.
  
Sources
Obtained by Treating Radium with Neutrons, Ores of metals   
Earth's crust, Found in Minerals, Mining, Ores of Minerals   
History
  
  
Who Discovered
Friedrich Oskar Giesel   
Lecoq de Boisbaudran   
Discovery
In 1902   
In 1875   
Abundance
  
  
Abundance In Universe
Not Available   
1 * 10-6 %   
16
Abundance In Sun
~-9999 %   
~0.000004 %   
16
Abundance In Meteorites
Not Available   
0.00 %   
16
Abundance In Earth's Crust
Not Available   
0.00 %   
24
Abundance In Oceans
Not Available   
0.00 %   
22
Uses
Uses & Benefits
  • Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
  
  • Gallium arsenide is a very important component of many semiconductors and led manufacturing.
  • Gallium nitride is also know as a semiconductor and it is used in Blu-ray technology, mobile smartphones and LED.
  
Industrial Uses
NA   
Electrical Industry, Electronic Industry   
Medical Uses
NA   
Surgical Instruments Manufacturing   
Other Uses
Alloys, Nuclear Research, Research Purposes   
Alloys   
Biological Properties
  
  
Toxicity
Toxic   
Non Toxic   
Present in Human Body
No   
Yes   
In Blood
0.00 Blood/mg dm-3   
37
0.08 Blood/mg dm-3   
13
In Bone
0.00 p.p.m.   
36
Not Available   
Physical Properties
Melting Point
1,227.00 °C   
38
29.78 °C   
99+
Boiling Point
3,200.00 °C   
26
2,403.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silvery White   
Luster
NA   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
1.50   
18
Brinell Hardness
Not Available   
56.80 MPa   
99+
Speed of Sound
Not Available   
2,740.00 m/s   
31
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
Ac   
Ga   
Isotopes
  
  
Known Isotopes
29   
10
24   
15
Electronegativity
  
  
Pauling Electronegativity
1.10   
99+
1.81   
15
Sanderson Electronegativity
Not Available   
2.42   
2
Allred Rochow Electronegativity
1.00   
36
1.82   
1
Mulliken-Jaffe Electronegativity
Not Available   
2.01   
5
Allen Electronegativity
Not Available   
1.76   
14
Electropositivity
  
  
Pauling Electropositivity
2.90   
10
2.19   
39
Ionization Energies
  
  
1st Energy Level
499.00 kJ/mol   
99+
578.80 kJ/mol   
99+
2nd Energy Level
1,170.00 kJ/mol   
99+
1,979.30 kJ/mol   
13
3rd Energy Level
1,900.00 kJ/mol   
99+
2,963.00 kJ/mol   
28
4th Energy Level
4,700.00 kJ/mol   
23
6,180.00 kJ/mol   
8
Electrochemical Equivalent
2.82 g/amp-hr   
18
0.87 g/amp-hr   
99+
Electron Work Function
Not Available   
4.20 eV   
23
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Ionization, Radioactive Isotopes   
Atomic Properties
Atomic Number
89   
29
31   
99+
Electron Configuration
[Rn] 6d1 7s2   
[Ar] 3d10 4s2 4p1   
Crystal Structure
Face Centered Cubic (FCC)   
Orthorhombic (ORTH)   
Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100   
ORTH-Crystal-Structure-of-Gallium.jpg#100   
Atom
  
  
Number of Protons
89   
29
31   
99+
Number of Neutrons
138   
16
39   
99+
Number of Electrons
89   
29
31   
99+
Radius of an Atom
  
  
Atomic Radius
195.00 pm   
7
135.00 pm   
99+
Covalent Radius
Not Available   
122.00 pm   
99+
Van der Waals Radius
Not Available   
187.00 pm   
32
Atomic Weight
227.00 amu   
25
69.72 amu   
99+
Atomic Volume
22.54 cm3/mol   
11
11.80 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Radium
  
Zinc
  
Next Element
Thorium
  
Rubidium
  
Valence Electron Potential
38.60 (-eV)   
99+
69.70 (-eV)   
19
Lattice Constant
567.00 pm   
8
451.97 pm   
18
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
10.00 g/cm3   
37
5.91 g/cm3   
99+
Density When Liquid (at m.p.)
Not Available   
6.10 g/cm3   
99+
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
0.00 (Pa)   
15
Elasticity properties
  
  
Young's Modulus
Not Available   
9.80 GPa   
99+
Poisson Ratio
Not Available   
0.47   
1
Other Mechanical Properties
NA   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
10.07   
28
5.91   
99+
Magnetic Ordering
Paramagnetic   
Diamagnetic   
Electrical Properties
  
  
Electrical Property
Unknown   
Semiconductor   
Resistivity
Not Available   
270.00 nΩ·m   
15
Electrical Conductivity
Not Available   
0.07 106/cm Ω   
29
Electron Affinity
Not Available   
28.90 kJ/mol   
31
Thermal Properties
Specific Heat
0.12 J/(kg K)   
40
0.37 J/(kg K)   
16
Molar Heat Capacity
27.20 J/mol·K   
18
25.86 J/mol·K   
35
Thermal Conductivity
12.00 W/m·K   
99+
40.60 W/m·K   
34
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
Not Available   
18.00 µm/(m·K)   
24
Enthalpy
  
  
Enthalpy of Vaporization
Not Available   
256.10 kJ/mol   
36
Enthalpy of Fusion
Not Available   
5.59 kJ/mol   
99+
Enthalpy of Atomization
301.00 kJ/mol   
36
276.10 kJ/mol   
39
Standard Molar Entropy
56.50 J/mol.K   
25
40.80 J/mol.K   
38
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