Teknetium

43
Tc
Kumpulan
7
Kala
5
Blok
d
Proton
Elektron
Neutron
43
43
55
Ciri-Ciri Am
Nombor atom
43
Berat atom
[98]
Nombor jisim
98
Kategori
Logam peralihan
Warna
Perak
Radioaktif
Ya
From the Greek word technetos, artificial
Struktur hablur
Hexagonal Ringkas
Sejarah
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.
Bilangan elektron per petala
2, 8, 18, 13, 2
Konfigurasi elektron
[Kr] 4d5 5s2
Tc
Technetium was the first element to be produced artificially
Ciri-Ciri Fizikal
Fasa
Pepejal
Ketumpatan
11.5 g/cm3
Takat lebur
2430.15 K | 2157 °C | 3914.6 °F
Takat didih
4538.15 K | 4265 °C | 7709 °F
Haba pelakuran
23 kJ/mol
Haba pengewapan
550 kJ/mol
Muatan haba molar
-
Banyak pada kerak bumi
Tiada
Banyak pada alam semesta
Tiada
Emilio
Kredit imej: pauli.uni-muenster.de
Emilio Segrè, one of the discoverer of the element
Nombor CAS
7440-26-8
PubChem CID Number
Tiada
Ciri-Ciri Atom
Jejari atom
136 pm
Jejari kovalen
147 pm
Keelektronegatifan
1.9 (Skala Pauling)
Kebolehan mengion
7.28 eV
Isipadu atom
8.5 cm3/mol
Daya pengaliran terma
0.506 W/cm·K
Keadaan pengoksidaan
-3, -1, 1, 2, 3, 4, 5, 6, 7
Aplikasi
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.
Technetium is harmful due to its radioactivity
Isotop
Isotop stabil
-
Isotop tidak stabil
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