Teknecio
43
Tc
Grupo
7
Perio
5
Bloko
d
Protonoj
Elektronoj
Neŭtronoj
43
43
55
Ĝeneralaj Propraĵoj
Atoma Nombro
43
Atommaso
[98]
Amasa Nombro
98
Kategorio
Transirmetaloj
Koloro
Arĝento
Radioaktiva
Jes
From the Greek word technetos, artificial
Kristala Strukturo
Simpla Sesangula
Historio
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.
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.
Elektronoj per ŝelo
2, 8, 18, 13, 2
Elektrona Agordo
[Kr] 4d5 5s2
Technetium was the first element to be produced artificially
Fizikaj Propraĵoj
Fazo
Solido
Denso
11,5 g/cm3
Fandpunkto
2430,15 K | 2157 °C | 3914,6 °F
Bolpunkto
4538,15 K | 4265 °C | 7709 °F
Varmo de Fuzio
23 kJ/mol
Varmo de Vaporiĝo
550 kJ/mol
Specifa Varmo Kapacito
-
Krusta Abundo
Neniu
Universa Abundo
Neniu
CAS Nombro
7440-26-8
PubChem Kunmetita Identiga Nombro
Neniu
Atomaj Propraĵoj
Atoma Radiuso
136 pm
Kovalenta Radiuso
147 pm
Elektronegativeco
1,9 (Pauling-skalo)
Potencialo de jonigo
7,28 eV
Atoma Volumo
8,5 cm3/mol
Termika Kondukto
0,506 W/cm·K
Oksidaj Ŝtatoj
-3, -1, 1, 2, 3, 4, 5, 6, 7
Aplikoj
Technetium is used in nuclear medicine to carry out a number of medical tests, mainly relating to imaging and functional studies of internal bodily organs like bone scan.
It is also used industrially for equipment calibration following its approval as a standard beta emitter.
Mild carbon steels may be effectively protected by minute quantities of technetium, but this corrosion protection is limited to closed systems because of technetium's radioactivity.
It is also used industrially for equipment calibration following its approval as a standard beta emitter.
Mild carbon steels may be effectively protected by minute quantities of technetium, but this corrosion protection is limited to closed systems because of technetium's radioactivity.
Technetium is harmful due to its radioactivity
Izotopoj
Stabilaj Izotopoj
-Malstabilaj Isotopoj
85Tc, 86Tc, 87Tc, 88Tc, 89Tc, 90Tc, 91Tc, 92Tc, 93Tc, 94Tc, 95Tc, 96Tc, 97Tc, 98Tc, 99Tc, 100Tc, 101Tc, 102Tc, 103Tc, 104Tc, 105Tc, 106Tc, 107Tc, 108Tc, 109Tc, 110Tc, 111Tc, 112Tc, 113Tc, 114Tc, 115Tc, 116Tc, 117Tc, 118Tc