;

Periodic Table Element Comparison: Compare Elements - Iridium vs Actinium

Compare Iridium and Actinium

Compare Iridium and Actinium on the basis of their properties, attributes and periodic table facts. Compare elements on more than 90 properties. All the elements of similar categories show a lot of similarities and differences in their chemical, atomic, physical properties and uses. These similarities and dissimilarities should be known while we study periodic table elements. You can study the detailed comparison between Iridium vs Actinium with most reliable information about their properties, attributes, facts, uses etc. You can compare Ir vs Ac on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more.

Facts

Iridium
77
Ir
192.217
Solid
Silver
transition metal
9
cobalt family 
6
d
[Xe] 4f14 5d7 6s2
2466 °C
4428 °C
2, 8, 18, 32, 15, 2
CAS7439-88-5
Neighborhood Elements of Iridium
Actinium
89
Ac
227
Solid
Silver
actinide
N/A
 
7
f
[Rn] 6d1 7s2
1050 °C
3200 °C
2, 8, 18, 32, 18, 9, 2
CAS7440-34-8
Neighborhood Elements of Actinium

History

History
The element Iridium was discovered by Smithson Tennant in year 1803 in France and United Kingdom. Iridium derived its name from from Iris, the Greek goddess of the rainbow
The element Actinium was discovered by Friedrich Oskar Giesel in year 1899 in France. Actinium derived its name derived its name from from the Greek aktis, 'ray'

Presence: Abundance in Nature and Around Us

Ppb by weight (1ppb =10^-7 %)
2×10-7%
2×10-7%
5.4e-07
4×10-8%
N/A
N/A
N/A
None
N/A
N/A
N/A
None

Crystal Structure and Atomic Structure

180 pm
8.5202570921986 cm3
137 pm
N/A
425
iridium Spectrum
383.9, 383.9, 383.9 pm
π/2, π/2, π/2
Fm_ 3m
225

Face Centered Cubic

iridium Crystal Structure
195 pm
22.542204568024 cm3
N/A
N/A
810
actinium Spectrum
567, 567, 567 pm
π/2, π/2, π/2
Fm_ 3m
225

Face Centered Cubic

actinium Crystal Structure

Atomic and Orbital Properties

Atomic Number
Number of Electrons (with no charge)
Number of Protons
Mass Number
Number of Neutrons
Shell structure (Electrons per energy level)
Electron Configuration
Valence Electrons
Oxidation State
Atomic Term Symbol (Quantum Numbers)
Shell structure
77
77
77
192.217
115.217
2, 8, 18, 32, 15, 2
[Xe] 4f14 5d7 6s2
5d7 6s2
-3;-1  1;2;3;4;5;6;7;8;9
4F9/2
iridium Shells
89
89
89
227
138
2, 8, 18, 32, 18, 9, 2
[Rn] 6d1 7s2
6d1 7s2
 3
2D3/2
actinium Shells

Isotopes - Nuclear Properties

Isotopes
Naturally occurring stable isotopes:
191Ir, 193Ir.
Naturally occurring stable isotopes:
None.

Chemical Properties: Ionization Energies and electron affinity

6
2.2
151 kJ/mol
880, 1.6×103 kJ/mol
3
1.1
N/A
499, 1170 kJ/mol

Physical Properties

22.56 g/cm3
8.5202570921986

 

528 GPa
210 GPa
320 GPa
0.26


 

6.5 MPa
1760 MPa
1670 MPa

 

2.1×107 S/m
4.7×10-8 m Ω
0.11

 

150 W/(m K)
6.4×10-6 K-1

 

Paramagnetic
N/A
1.67×10-9
3.21×10-10
3.77e-05

 

N/A

 

4825 m/s
10.07 g/cm3
22.542204568024

 

N/A
N/A
N/A
N/A


 

N/A
N/A
N/A

 

N/A
N/A
N/A

 

12 W/(m K)
N/A

 

N/A
N/A
N/A
N/A
N/A

 

N/A

 

N/A

Thermal Properties - Enthalpies and thermodynamics

2466 °C
4428 °C
N/A
0.11

 

26 kJ/mol
560 kJ/mol
N/A
1050 °C
3200 °C
N/A
N/A

 

14 kJ/mol
400 kJ/mol
N/A

Regulatory and Health - Health and Safety Parameters and Guidelines

CAS7439-88-5
N/A
4.1
3089
N/A
N/A
N/A
N/A
N/A

 

N/A
N/A
CAS7440-34-8
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A

 

N/A
N/A