Teknetium

43
Tc
Golongan
7
Periode
5
Blok
d
Proton
Elektron
Neutron
43
43
55
Sifat Umum
Nomor atom
43
Massa atom
[98]
Nomor massa
98
Kategori
Logam transisi
Warna
Perak
Radioaktif
Ya
From the Greek word technetos, artificial
Struktur kristal
Segienam Sederhana
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.
Elektron per kulit
2, 8, 18, 13, 2
Konfigurasi elektron
[Kr] 4d5 5s2
Tc
Technetium was the first element to be produced artificially
Sifat Fisika
Fase
Solid
Kepadatan
11,5 g/cm3
Titik lebur
2430,15 K | 2157 °C | 3914,6 °F
Titik didih
4538,15 K | 4265 °C | 7709 °F
Kalor peleburan
23 kJ/mol
Kalor penguapan
550 kJ/mol
Kapasitas kalor molar
-
Kelimpahan di kerak bumi
n/a
Kelimpahan di alam semesta
n/a
Emilio
Kredit Gambar: pauli.uni-muenster.de
Emilio Segrè, one of the discoverer of the element
Nomor CAS
7440-26-8
PubChem CID Number
n/a
Sifat Atom
Jari-jari atom
136 pm
Jari-jari kovalen
147 pm
Elektronegativitas
1,9 (Skala Pauling)
Potensi Ionisasi
7,28 eV
Volume atom
8,5 cm3/mol
Kondusivitas termal
0,506 W/cm·K
Bilangan oksidasi
-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