Tegnesium
43
Tc
Groep
7
Periode
5
Blok
d
Protrone
Elektrone
Neutrone
43
43
55
Algemene Eienskappe
Atoom Nommer
43
Atoommassa
[98]
Massa Nommer
98
Kategorie
Oorgangsmetale
Kleur
Silver
Radioaktief
Ja
From the Greek word technetos, artificial
Kristalstruktuur
Eenvoudige seshoekige
Geskiendenis
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.
Elektrone per skil
2, 8, 18, 13, 2
Elektronkonfigurasie
[Kr] 4d5 5s2
Technetium was the first element to be produced artificially
Fisiese Eienskappe
Fase
Soliede
Digtheid
11,5 g/cm3
Smeltpunt
2430,15 K | 2157 °C | 3914,6 °F
Kookpunt
4538,15 K | 4265 °C | 7709 °F
Heat of Fusion
23 kJ/mol
Heat of Vaporization
550 kJ/mol
Spesifieke Hitte Kapasiteit
-
Oorvloed in die aardkors
n/a
Oorvloed in die heelal
n/a
CAS Nommer
7440-26-8
PubChem CID Nommer
n/a
Atomiese Eienskappe
Atoom radius
136 pm
Kovalente Radius
147 pm
Elektronegatiewiteit
1,9 (Pauling scale)
Ionisasie potensiaal
7,28 eV
Atoom volume
8,5 cm3/mol
Termiese geleidingsvermoë
0,506 W/cm·K
Oksidasiestate
-3, -1, 1, 2, 3, 4, 5, 6, 7
Toepassings
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
Isotope
Stabiele Isotope
-Onstabiele Isotope
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