Teknetyum
43
Tc
Grup
7
Periyot
5
Blok
d
Protonlar
Elektronlar
Nötronlar
43
43
55
Temel Özellikleri
Atom numarası
43
Atom ağırlığı
[98]
Kütle Numarası
98
Kategori
Geçiş metalleri
Renk
Gümüşi
Radyoaktif
Evet
From the Greek word technetos, artificial
Kristal yapısı
Basit altıgen
Tarihi
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.
Enerji seviyesi başına Elektronlar
2, 8, 18, 13, 2
Elektron dizilimi
[Kr] 4d5 5s2
Technetium was the first element to be produced artificially
Fiziksel Özellikleri
Faz
Katı
Yoğunluk
11,5 g/cm3
Ergime noktası
2430,15 K | 2157 °C | 3914,6 °F
Kaynama noktası
4538,15 K | 4265 °C | 7709 °F
Ergime ısısı
23 kJ/mol
Buharlaşma ısısı
550 kJ/mol
Isı kapasitesi
-
Dünya kabuğundaki bulunulabilirliği
yok
Evrendeki bulunulabilirliği
yok
CAS Numarası
7440-26-8
PubChem CID Numarası
yok
Atom Özellikleri
Atom yarıçapı
136 pm
Kovalent yarıçapı
147 pm
Elektronegatifliği
1,9 (Pauling ölçeği)
İyonlaşma enerjisi
7,28 eV
Atomik Hacim
8,5 cm3/mol
Isıl iletkenlik
0,506 W/cm·K
Yükseltgenme seviyeleri
-3, -1, 1, 2, 3, 4, 5, 6, 7
Uygulamalar
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
İzotoplar
Kararlı izotoplar
-Kararsız izotoplar
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