Periodic Table Element Comparison: Compare Elements - Actinium vs Chromium

Compare Actinium and Chromium 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 Actinium vs Chromium with most reliable information about their properties, attributes, facts, uses etc. You can compare Ac vs Cr on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more. Actinium and Chromium comparison table on more than 90 properties.

Actinium and Chromium Comparison

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1
1
H
Hydrogen
1.008

Atomic #

Electronic Shell #

Symbol
Name
Atomic Weight
HGas
HgLiquid
CSolid
Metals
Metalloids
NonMetals
Alkali metals
Alkali earth metals
Lanthanoids
Transition metals
Post-transition metals
Other nonmetals
Halogens
Nobel gas
Actinoids
2
He
Helium
4.003
2
3
Li
Lithium
6.941
4
Be
Beryllium
9.012
5
B
Boron
10.811
6
C
Carbon
12.011
7
N
Nitrogen
14.007
8
O
Oxygen
15.999
9
F
Fluorine
18.998
10
Ne
Neon
20.180
3
11
Na
Sodium
22.990
12
Mg
Magnesium
24.305
13
Al
Aluminium
26.982
14
Si
Silicon
28.085
15
P
Phosphorus
30.974
16
S
Sulfur
32.065
17
Cl
Chlorine
35.453
18
Ar
Argon
39.948
4
19
K
Potassium
39.098
20
Ca
Calcium
40.078
21
Sc
Scandium
44.956
22
Ti
Titanium
47.867
23
V
Vanadium
50.941
24
Cr
Chromium
51.996
25
Mn
Manganese
54.938
26
Fe
Iron
55.845
27
Co
Cobalt
58.933
28
Ni
Nickel
58.693
29
Cu
Copper
63.546
30
Zn
Zinc
65.409
31
Ga
Gallium
69.723
32
Ge
Germanium
72.640
33
As
Arsenic
74.922
34
Se
Selenium
78.960
35
Br
Bromine
79.904
36
Kr
Krypton
83.798
5
37
Rb
Rubidium
85.468
38
Sr
Strontium
87.620
39
Y
Yttrium
88.906
40
Zr
Zirconium
91.224
41
Nb
Niobium
92.906
42
Mo
Molybdenum
95.940
43
Tc
Technetium
98
44
Ru
Ruthenium
101.070
45
Rh
Rhodium
102.906
46
Pd
Palladium
106.420
47
Ag
Silver
107.868
48
Cd
Cadmium
112.411
49
In
Indium
114.818
50
Sn
Tin
118.710
51
Sb
Antimony
121.760
52
Te
Tellurium
127.600
53
I
Iodine
126.904
54
Xe
Xenon
131.293
6
55
Cs
Cesium
132.905
56
Ba
Barium
137.327
57 - 71
La - Lu
Lanthanides
72
Hf
Hafnium
178.490
73
Ta
Tantalum
180.948
74
W
Tungsten
183.840
75
Re
Rhenium
186.207
76
Os
Osmium
190.230
77
Ir
Iridium
192.217
78
Pt
Platinum
195.078
79
Au
Gold
196.967
80
Hg
Mercury
200.590
81
Tl
Thallium
204.383
82
Pb
Lead
207.200
83
Bi
Bismuth
208.980
84
Po
Polonium
209
85
At
Astatine
210
86
Rn
Radon
222
7
87
Fr
Francium
223
88
Ra
Radium
226
89 - 103
Ac - Lr
Actinides
104
Rf
Rutherfordium
261
105
Db
Dubnium
262
106
Sg
Seaborgium
266
107
Bh
Bohrium
264
108
Hs
Hassium
269
109
Mt
Meitnerium
268
110
Ds
Darmstadtium
281
111
Rg
Roentgenium
272
112
Cn
Copernicium
285
113
Nh
Nihonium
284
114
Fl
Flerovium
289
115
Mc
Moscovium
288
116
Lv
Livermorium
292
117
Ts
Tennessine
294
118
Og
Oganesson
294
Lanthanides
57
La
Lanthanum
138.905
58
Ce
Cerium
140.116
59
Pr
Praseodymium
140.908
60
Nd
Neodymium
144.240
61
Pm
Promethium
145
62
Sm
Samarium
150.360
63
Eu
Europium
151.964
64
Gd
Gadolinium
157.250
65
Tb
Terbium
158.925
66
Dy
Dysprosium
162.500
67
Ho
Holmium
164.930
68
Er
Erbium
167.259
69
Tm
Thulium
168.934
70
Yb
Ytterbium
173.040
71
Lu
Lutetium
174.967
Actinides
89
Ac
Actinium
227
90
Th
Thorium
232.038
91
Pa
Protactinium
231.036
92
U
Uranium
238.029
93
Np
Neptunium
237
94
Pu
Plutonium
244
95
Am
Americium
243
96
Cm
Curium
247
97
Bk
Berkelium
247
98
Cf
Californium
251
99
Es
Einsteinium
252
100
Fm
Fermium
257
101
Md
Mendelevium
258
102
No
Nobelium
259
103
Lr
Lawrencium
262

Facts

NameActiniumChromium
Atomic Number8924
Atomic SymbolAcCr
Atomic Weight227 51.9961
Phase at STPSolid Solid
ColorSilver Silver
Metallic ClassificationActinide Transition Metal
Group in Periodic Tablegroup - group 6
Group Namechromium family
Period in Periodic Tableperiod 7 period 4
Block in Periodic Tablef -blockd -block
Electronic Configuration[Rn] 6d1 7s2 [Ar] 3d5 4s1
Electronic Shell Structure (Electrons per shell)2, 8, 18, 32, 18, 9, 22, 8, 13, 1
Melting Point1323 K2180 K
Boiling Point3473 K2944 K
CAS NumberCAS7440-34-8 CAS7440-47-3
Neighborhood ElementsNeighborhood Elements of ActiniumNeighborhood Elements of Chromium

History

ParameterActiniumChromium
HistoryThe element Actinium was discovered by F. O. Giesel in year 1902 in France. Actinium derived its name from the Greek aktis, 'ray'.The element Chromium was discovered by N. Vauquelin in year 1797 in France. Chromium derived its name from the Greek word chroma, meaning 'color'.
DiscoveryF. O. Giesel (1902)N. Vauquelin (1797)
IsolatedF. O. Giesel (1902)N. Vauquelin (1798)

Presence: Abundance in Nature and Around Us

Parts per billion (ppb) by weight / by atoms (1ppb =10^-7 %)

PropertyActiniumChromium
Abundance in Universe / 15000 / 400
Abundance in Sun / 20000 / 400
Abundance in Meteorites / 3100000 / 1200000
Abundance in Earth's Crust / 140000 / 55000
Abundance in Oceans / 0.6 / 0.071
Abundance in Humans / 30 / 4

Crystal Structure and Atomic Structure

PropertyActiniumChromium
Atomic Volume22.5422 cm3/mol7.2824 cm3/mol
Atomic Radius195 pm166 pm
Covalent Radius- 127 pm
Van der Waals Radius- -

Atomic Spectrum - Spectral Lines

Emission SpectrumEmission Spectrum of Actinium | SchoolMyKidsEmission Spectrum of Chromium | SchoolMyKids
Absorption SpectrumAbsorption Spectrum of Actinium | SchoolMyKidsAbsorption Spectrum of Chromium | SchoolMyKids
Lattice Constant567, 567, 567 pm291, 291, 291 pm
Lattice Angleπ/2, π/2, π/2π/2, π/2, π/2
Space Group NameFm_ 3m Im_ 3m
Space Group Number225 229
Crystal Structure

Face Centered Cubic

89 Ac Actinium - Crystal Structure | SchoolMyKids

Body Centered Cubic

24 Cr Chromium - Crystal Structure | SchoolMyKids

Atomic and Orbital Properties

PropertyActiniumChromium
Atomic Number8924
Number of Electrons (with no charge)8924
Number of Protons8924
Mass Number22751.9961
Number of Neutrons13828
Shell structure (Electrons per energy level)2, 8, 18, 32, 18, 9, 22, 8, 13, 1
Electron Configuration[Rn] 6d1 7s2 [Ar] 3d5 4s1
Valence Electrons6d1 7s2 3d5 4s1
Oxidation State32, 3, 6
Atomic Term Symbol (Quantum Numbers)2D3/2 7S3
Shell structure89 Ac Actinium Electron Shell Structure | SchoolMyKids24 Cr Chromium Electron Shell Structure | SchoolMyKids

Isotopes and Nuclear Properties

Actinium has 0 stable naturally occuring isotopes while Chromium has 4 stable naturally occuring isotopes.

ParameterActiniumChromium
Known Isotopes206Ac, 207Ac, 208Ac, 209Ac, 210Ac, 211Ac, 212Ac, 213Ac, 214Ac, 215Ac, 216Ac, 217Ac, 218Ac, 219Ac, 220Ac, 221Ac, 222Ac, 223Ac, 224Ac, 225Ac, 226Ac, 227Ac, 228Ac, 229Ac, 230Ac, 231Ac, 232Ac, 233Ac, 234Ac, 235Ac, 236Ac42Cr, 43Cr, 44Cr, 45Cr, 46Cr, 47Cr, 48Cr, 49Cr, 50Cr, 51Cr, 52Cr, 53Cr, 54Cr, 55Cr, 56Cr, 57Cr, 58Cr, 59Cr, 60Cr, 61Cr, 62Cr, 63Cr, 64Cr, 65Cr, 66Cr, 67Cr
Stable Isotopes

-

Naturally occurring stable isotopes:

50Cr, 52Cr, 53Cr, 54Cr

Neutron Cross Section 810 3.1
Neutron Mass Absorption 0.079 0.0021

Chemical Properties: Ionization Energies and electron affinity

PropertyActiniumChromium
Valence or Valency3 6
Electronegativity1.1 Pauling Scale1.66 Pauling Scale
Electron Affinity- 64.3 kJ/mol
Ionization Energies
1st: 499 kJ/mol
2nd: 1170 kJ/mol
1st: 652.9 kJ/mol
2nd: 1590.6 kJ/mol
3rd: 2987 kJ/mol
4th: 4743 kJ/mol
5th: 6702 kJ/mol
6th: 8744.9 kJ/mol
7th: 15455 kJ/mol
8th: 17820 kJ/mol
9th: 20190 kJ/mol
10th: 23580 kJ/mol
11th: 26130 kJ/mol
12th: 28750 kJ/mol
13th: 34230 kJ/mol
14th: 37066 kJ/mol
15th: 97510 kJ/mol
16th: 105800 kJ/mol
17th: 114300 kJ/mol
18th: 125300 kJ/mol
19th: 134700 kJ/mol
20th: 144300 kJ/mol
21st: 157700 kJ/mol
22nd: 166090 kJ/mol
23rd: 721870 kJ/mol
24th: 761733 kJ/mol

Physical Properties

PropertyActiniumChromium
Density10.07 g/cm37.14 g/cm3
Molar Volume22.5422 cm3/mol7.2824 cm3/mol

Elastic Properties

Young Modulus- 279
Shear Modulus- 115 GPa
Bulk Modulus- 160 GPa
Poisson Ratio- 0.21

Hardness - Tests to Measure of Hardness of Element

Mohs Hardness- 8.5 MPa
Vickers Hardness- 1060 MPa
Brinell Hardness- 1120 MPa

Electrical Properties

Electrical Conductivity- 7900000 S/m
Resistivity - 1.3e-7 m Ω
Superconducting Point- -

Heat and Conduction Properties

Thermal Conductivity12 W/(m K)94 W/(m K)
Thermal Expansion- 0.0000049 /K

Magnetic Properties

Magnetic Type- Antiferromagnetic
Curie Point- -
Mass Magnetic Susceptibility- 4.45e-8 m3/kg
Molar Magnetic Susceptibility- 2.314e-9 m3/mol
Volume Magnetic Susceptibility- 0.0003177

Optical Properties

Refractive Index- -

Acoustic Properties

Speed of Sound- 5940 m/s

Thermal Properties - Enthalpies and thermodynamics

PropertyActiniumChromium
Melting Point1323 K2180 K
Boiling Point3473 K2944 K
Critical Temperature- -
Superconducting Point- -

Enthalpies

Heat of Fusion14 kJ/mol20.5 kJ/mol
Heat of Vaporization400 kJ/mol339 kJ/mol
Heat of Combustion- -

Regulatory and Health - Health and Safety Parameters and Guidelines

ParameterActiniumChromium
CAS NumberCAS7440-34-8 CAS7440-47-3
RTECS Number- RTECSGB4200000
DOT Hazard Class- 4.1
DOT Numbers- 3089
EU Number- -
NFPA Fire Rating- 1
NFPA Health Rating- 2
NFPA Reactivity Rating- 1
NFPA Hazards- -
AutoIgnition Point- 400 °C
Flashpoint- -

Compare With Other Elements

Compare Actinium and Chromium with other elements of the periodic table.

Compare Actinium with all Group elements

Compare Actinium with all Period 7 elements

Compare Actinium with all Actinide elements

Compare Chromium with all Group 6 elements

Compare Chromium with all Period 4 elements

Compare Chromium with all Transition Metal elements