technetium

technetium (chemical element)

Periodic table location

Image

atomic symbol | Tc atomic number | 43 short electronic configuration | [Kr]5s^24d^5 Aufbau diagram | 4d 5s block | d group | 7 period | 5 atomic mass | 98 u (unified atomic mass units) (atomic mass number given for longest-lived isotope) half-life | 0.21 Myr (megayears)

phase at STP | solid melting point | 2157 °C (rank: 11th) boiling point | 4265 °C (rank: 11th) molar heat of fusion | 23 kJ/mol (rank: 15th) molar heat of vaporization | 550 kJ/mol (rank: 12th) specific heat at STP | 63 J/(kg K) (rank: 88th) (properties at standard conditions)

density | 11.5 g/cm^3 (rank: 23rd) molar volume | 8.5 cm^3/mol tensile yield strength | 1.29 GPa (rank: 1st) ultimate tensile strength | 1.51 GPa (rank: 1st) thermal conductivity | 51 W/(m K) (rank: 34th) (properties at standard conditions)

electrical type | conductor resistivity | 2×10^-7 Ω m (ohm meters) electrical conductivity | 5×10^6 S/m (siemens per meter) magnetic type | paramagnetic volume magnetic susceptibility | 3.933×10^-4 mass magnetic susceptibility | 3.42×10^-8 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 3.352×10^-9 m^3/mol (cubic meters per mole) superconducting point | 7.8 K (kelvins) color | (silver)

valence | 6 electronegativity | 1.9 electron affinity | 53 kJ/mol (kilojoules per mole) first ionization energy | 702 kJ/mol (kilojoules per mole) ionization energies | 702 kJ/mol | 1470 kJ/mol | 2850 kJ/mol

Reactivity

term symbol | ^6S_(5/2) atomic radius | 135 pm covalent radius | 147 pm (electronic ground state properties)

(neutral technetium atomic spectrum)

solar abundance | 0 mass% meteorite abundance | 0 mass% crust abundance | 0 mass% ocean abundance | 0 mass% human abundance | 0 mass% solar molar abundance | 0 mol% meteorite molar abundance | 0 mol% ocean molar abundance | 0 mol% crust molar abundance | 0 mol% human molar abundance | 0 mol%

half-life | 0.21 Myr lifetime | 6 Myr (rank: 1st) specific radioactivity | 32.68 MBq/g decay mode | beta decay nuclear spin | Tc-85: 1/2^- | Tc-86: 0^+ | Tc-87: 9/2^+ | Tc-89: 9/2^+ | Tc-90: 1^+ | Tc-91: 9/2^+ | Tc-92: 8^+ | Tc-93: 9/2^+ | Tc-94: 7^+ | Tc-95: 9/2^+ | Tc-96: 7^+ | Tc-97: 9/2^+ | Tc-98: 6^+ | Tc-99: 9/2^+ | Tc-100: 1^+ | Tc-101: 9/2^+ | Tc-102: 1^+ | Tc-103: 5/2^+ | Tc-104: 3^+ | Tc-105: 3/2^- | Tc-107: 3/2^- | Tc-108: 2^+ | Tc-109: 5/2^+ | Tc-110: 2^+ | Tc-111: 5/2^+ | Tc-112: 2^+ | Tc-113: 3/2^- | Tc-114: 2^+ | Tc-115: 3/2^- | Tc-116: 2^+ | Tc-117: 3/2^- | Tc-118: 2^+ unstable isotopes | Tc-98 (4.2 Myr) | Tc-97 (4.21 Myr) | Tc-99 (0.2111 Myr) | Tc-96 (100 h) | Tc-95 (20 h) | Tc-94 (4.89 h) | Tc-93 (170 min) | Tc-104 (18 min) | Tc-101 (14.22 min) | Tc-105 (7.67 min) | Tc-92 (4.25 min) | Tc-91 (188 s) | Tc-103 (54.2 s) | Tc-106 (35.6 s) | Tc-107 (21.2 s) | Tc-100 (15.46 s) | Tc-89 (12.8 s) | Tc-90 (8.7 s) | Tc-88 (5.8 s) | Tc-102 (5.28 s) | Tc-108 (5.17 s) | Tc-87 (2.18 s) | Tc-110 (920 ms) | Tc-109 (860 ms) | Tc-112 (290 ms) | Tc-111 (290 ms) | Tc-113 (170 ms) | Tc-114 (150 ms) | Tc-116 (90 ms) | Tc-115 (73 ms) | Tc-86 (55 ms) | Tc-117 (40 ms) | Tc-118 (30 ms) | Tc-85 (110 ns) neutron cross-section | 22 b

CAS number | 7440-26-8