Atomic Number | 43 |
---|---|
Atomic Weight | 97.90721 |
Mass Number | 83 |
Group | 7 |
---|---|
Period | 5 |
Block | d |
Protons | 43 p+ |
---|---|
Neutrons | 40 n0 |
Electrons | 43 e- |
Physical Properties | |
---|---|
Atomic Radius | 135 pm
|
Molar Volume | 8.5 cm³/mol
|
Covalent Radius | 128 pm
|
Metallic Radius | 127 pm
|
Ionic Radius | 64.5 pm
|
Crystal Radius | 78.5 pm
|
Van der Waals Radius | 216 pm
|
Density | 11 g/cm³
|
Energy | |
Proton Affinity | |
Electron Affinity | 0.55 eV/particle
|
Ionization Energy | 7.119381 eV/particle
|
Heat of Vaporization | 585 kJ/mol
|
Heat of Fusion | 23.8 kJ/mol
|
Heat of Formation | 678 kJ/mol
|
Electrons | |
Electron Shells | 2, 8, 18, 13, 2 |
Valence Electrons | 2 |
Electron Configuration | [Kr] 4d5 5s2 |
Oxidation States | -3, -1, 0, 1, 2, 3, 4, 5, 6, 7 |
Electronegativity | 2.1
|
Electrophilicity | 1.1191961031633155 eV/particle
|
Phases | |
Phase | Solid |
Gas Phase | |
Boiling Point | 4,535.15 K
|
Melting Point | 2,430.15 K
|
Critical Pressure | |
Critical Temperature | |
Triple Point | |
Visual | |
Technetium is a Silver. Tc has a CPK of #ff1493, Jmol of #3b9e9e, and MOLCAS GV of #3b9e9e. The Appearance of Element 43 is shiny gray metal. | |
Color | Silver
|
Appearance | shiny gray metal |
Refractive Index | |
Thermodynamic Properties | |
Thermal Conductivity | 50.6 W/(m K)
|
Thermal Expansion | |
Molar Heat Capacity | |
Specific Heat Capacity | |
Heat Capacity Ratio (Adiabatic Index) | |
Electrical Properties | |
Type | Conductor |
Electrical Conductivity | 5 MS/m
|
Electrical Resistivity | 0.0000002 m Ω
|
Superconducting Point | 7.7 K
|
Magnetism | |
Type | paramagnetic |
Magnetic Susceptibility (Mass) | 0.0000000342 m³/Kg
|
Magnetic Susceptibility (Molar) | 0.000000003352 m³/mol
|
Magnetic Susceptibility (Volume) | 0.0003933
|
Magnetic Ordering | |
Curie Point | |
Neel Point | |
Structure | |
The Crystal Structure of Technetium is HEX. The lattice constant of Tc is 2.74 Å. The lattice angles of Element 43 are π/2, π/2, 2 π/3. | |
Crystal Structure | Simple Hexagonal (HEX) |
Lattice Constant | 2.74 Å
|
Lattice Angles | π/2, π/2, 2 π/3 |
Mechanical Properties | |
Hardness | |
Bulk Modulus | |
Shear Modulus | |
Young Modulus | |
Poisson Ratio | |
Speed of Sound | |
Classification | |
The CAS Group of Technetium is VIIA. The IUPAC Group of Tc is VIIB. The Glawe Number of Element 43 is 59. The Mendeleev Number of Technetium (Tc) is 56. The Pettifor Number of Technetium is 58. The Goldschmidt Class of Tc is synthetic. | |
Category | Transition metals, Transition metals |
CAS Group | VIIA |
IUPAC Group | VIIB |
Glawe Number | 59 |
Mendeleev Number | 56 |
Pettifor Number | 58 |
Geochemical Class | |
Goldschmidt Class | synthetic |
Other | |
The Dipole Polarizability of Technetium is 79 plus or minus 10 a₀. Tc has a C6 Dispersion Coefficient (GB) of 939 a₀. The Allotropes of Element 43 is . The Neutron Cross Section of Technetium (Tc) is 22. The Quantum Numbers of Technetium is 6S5/2. The Space Group of Tc is 194 (P63/mmc). | |
Gas Basicity | |
Dipole Polarizability | |
C6 Dispersion Coefficient | |
Allotropes | |
Neutron Cross Section | 22
|
Neutron Mass Absorption | |
Quantum Numbers | 6S5/2 |
Space Group | 194 (P63/mmc) |
Stable Isotopes | 0 |
---|---|
Unstable Isotopes | 40 |
Radioactive Isotopes | 37 |
Abundance | |
---|---|
Relative Atomic Mass | |
Mass Number | 83 |
G-Factor | |
Half Life | |
Spin | 1/2 |
Quadrupole Moment | 0
|
Discovery Year | |
Parity | - |
Decay Mode | Intensity |
---|---|
p (proton emission) | % |
β+ (β+ decay; β+ = ϵ + e+) | % |
β+ p (β+-delayed proton emission) | % |
Abundance | |
---|---|
Relative Atomic Mass | |
Mass Number | 84 |
G-Factor | |
Half Life | |
Spin | 1 |
Quadrupole Moment | |
Discovery Year | |
Parity | + |
Decay Mode | Intensity |
---|---|
p (proton emission) | % |
β+ (β+ decay; β+ = ϵ + e+) | % |
β+ p (β+-delayed proton emission) | % |
Abundance | |
---|---|
Relative Atomic Mass | |
Mass Number | 85 |
G-Factor | |
Half Life | |
Spin | 1/2 |
Quadrupole Moment | 0
|
Discovery Year | |
Parity | - |
Decay Mode | Intensity |
---|---|
p (proton emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 86 |
G-Factor | 0
|
Half Life | 55 ± 7 ms
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1992 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
β+ p (β+-delayed proton emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 87 |
G-Factor | |
Half Life | 2.14 ± 0.17 s
|
Spin | 9/2 |
Quadrupole Moment | |
Discovery Year | 1991 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
β+ p (β+-delayed proton emission) | 0.7% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 88 |
G-Factor | |
Half Life | 6.4 ± 0.8 s
|
Spin | 2 |
Quadrupole Moment | |
Discovery Year | 1991 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
β+ p (β+-delayed proton emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 89 |
G-Factor | |
Half Life | 12.8 ± 0.9 s
|
Spin | 9/2 |
Quadrupole Moment | |
Discovery Year | 1991 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 90 |
G-Factor | |
Half Life | 49.2 ± 0.4 s
|
Spin | 8 |
Quadrupole Moment | |
Discovery Year | 1974 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 91 |
G-Factor | |
Half Life | 3.14 ± 0.02 m
|
Spin | 9/2 |
Quadrupole Moment | |
Discovery Year | 1974 |
Parity |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 92 |
G-Factor | |
Half Life | 4.25 ± 0.15 m
|
Spin | 8 |
Quadrupole Moment | |
Discovery Year | 1964 |
Parity |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 93 |
G-Factor | 1.4044444444444 ± 0.013333333333333
|
Half Life | 2.75 ± 0.05 h
|
Spin | 9/2 |
Quadrupole Moment | |
Discovery Year | 1948 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 94 |
G-Factor | 0.73142857142857 ± 0.0071428571428571
|
Half Life | 293 ± 1 m
|
Spin | 7 |
Quadrupole Moment | |
Discovery Year | 1948 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 95 |
G-Factor | 1.32 ± 0.013333333333333
|
Half Life | 19.258 ± 0.026 h
|
Spin | 9/2 |
Quadrupole Moment | |
Discovery Year | 1947 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 96 |
G-Factor | 0.72714285714286 ± 0.0071428571428571
|
Half Life | 4.28 ± 0.07 d
|
Spin | 7 |
Quadrupole Moment | |
Discovery Year | 1947 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 97 |
G-Factor | 1.2933333333333 ± 0.02
|
Half Life | 4.21 ± 0.16 My
|
Spin | 9/2 |
Quadrupole Moment | |
Discovery Year | 1946 |
Parity | + |
Decay Mode | Intensity |
---|---|
ϵ (electron capture) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 98 |
G-Factor | |
Half Life | 4.2 ± 0.3 My
|
Spin | 6 |
Quadrupole Moment | |
Discovery Year | 1955 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β+ (β+ decay; β+ = ϵ + e+) | 0% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 99 |
G-Factor | |
Half Life | 211.1 ± 1.2 ky
|
Spin | 9/2 |
Quadrupole Moment | -0.129 ± 0.006
|
Discovery Year | 1938 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 100 |
G-Factor | |
Half Life | 15.46 ± 0.19 s
|
Spin | 1 |
Quadrupole Moment | |
Discovery Year | 1952 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
ϵ (electron capture) | 0.0018% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 101 |
G-Factor | |
Half Life | 14.22 ± 0.01 m
|
Spin | 9/2 |
Quadrupole Moment | |
Discovery Year | 1941 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 102 |
G-Factor | |
Half Life | 5.28 ± 0.15 s
|
Spin | 1 |
Quadrupole Moment | |
Discovery Year | 1954 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 103 |
G-Factor | |
Half Life | 54.2 ± 0.8 s
|
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 1957 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 104 |
G-Factor | |
Half Life | 18.3 ± 0.3 m
|
Spin | 3 |
Quadrupole Moment | |
Discovery Year | 1956 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 105 |
G-Factor | |
Half Life | 7.64 ± 0.06 m
|
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | 1955 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 106 |
G-Factor | |
Half Life | 35.6 ± 0.6 s
|
Spin | 1 |
Quadrupole Moment | |
Discovery Year | 1965 |
Parity |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 107 |
G-Factor | |
Half Life | 21.2 ± 0.2 s
|
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | 1965 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 108 |
G-Factor | |
Half Life | 5.17 ± 0.07 s
|
Spin | 2 |
Quadrupole Moment | |
Discovery Year | 1970 |
Parity |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 109 |
G-Factor | |
Half Life | 905 ± 21 ms
|
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 1976 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 0.08% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 110 |
G-Factor | |
Half Life | 900 ± 13 ms
|
Spin | 2 |
Quadrupole Moment | |
Discovery Year | 1976 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 0.04% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 111 |
G-Factor | |
Half Life | 350 ± 11 ms
|
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 1988 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 0.85% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 112 |
G-Factor | |
Half Life | 323 ± 6 ms
|
Spin | 2 |
Quadrupole Moment | |
Discovery Year | 1990 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 1.5% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 113 |
G-Factor | |
Half Life | 152 ± 8 ms
|
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 1992 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 2.1% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 114 |
G-Factor | |
Half Life | 121 ± 9 ms
|
Spin | 5 |
Quadrupole Moment | |
Discovery Year | 1994 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 1.3% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 115 |
G-Factor | |
Half Life | 78 ± 2 ms
|
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 1994 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 116 |
G-Factor | |
Half Life | 57 ± 3 ms
|
Spin | 2 |
Quadrupole Moment | |
Discovery Year | 1997 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | % |
2n (2-neutron emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 117 |
G-Factor | |
Half Life | 44.5 ± 3 ms
|
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 1997 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | % |
2n (2-neutron emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 118 |
G-Factor | |
Half Life | 30 ± 4 ms
|
Spin | 2 |
Quadrupole Moment | |
Discovery Year | 2010 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | % |
2n (2-neutron emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 119 |
G-Factor | |
Half Life | 22 ± 3 ms
|
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 2010 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | % |
2n (2-neutron emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 120 |
G-Factor | |
Half Life | 21 ± 5 ms
|
Spin | 3 |
Quadrupole Moment | |
Discovery Year | 2010 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | % |
2n (2-neutron emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 121 |
G-Factor | |
Half Life | 22 ± 6 ms
|
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 2015 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | % |
2n (2-neutron emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 122 |
G-Factor | |
Half Life | |
Spin | 1 |
Quadrupole Moment | |
Discovery Year | 2018 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | % |
β− n (β−-delayed neutron emission) | % |
2n (2-neutron emission) | % |
Element 43 was predicted on the basis of the periodic table, and was erroneously reported as having been discovered in 1925, at which time it was named masurium. The element was actually discovered by Carlo Perrier and Emilio Segrè in 1937. It was also found in a sample of molybdenum sent by Ernest Lawrence that was bombarded by deuterons in the Berkeley cyclotron. From the Greek word technetos, artificial
Discoverers | Carlo Perrier, Émillo Segrè |
---|---|
Discovery Location | Italy |
Discovery Year | 1937 |
Etymology (Name Origin) | Greek: technêtos (artificial). |
Pronunciation | tek-NEE-shi-em (English) |
Made first by bombarding molybdenum with deuterons (heavy hydrogen) in a cyclotron.
Abundance | |
---|---|
Abundance in Earth's crust | |
Abundance in Oceans | |
Abundance in Human Body | 0 %
|
Abundance in Meteor | 0 %
|
Abundance in Sun | 0 %
|
Abundance in Universe | 0 %
|
1 | s | 0.891 |
2 | p | 4.0592 |
2 | s | 11.3718 |
3 | d | 14.647 |
3 | p | 16.6159 |
3 | s | 16.2088 |
4 | d | 30.118 |
4 | p | 27.1888 |
4 | s | 25.8016 |
5 | s | 35.7735 |