Технициум

43
Tc
Група
7
Периода
5
блок
d
Protons
Electrons
Neutrons
43
43
55
Општи Својства
Атомски број
43
Атомска тежина
[98]
Mass Number
98
Category
Преоден метал
Color
Silver
Radioactive
Да
From the Greek word technetos, artificial
Кристална структура
Simple Hexagonal
History
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.
Electrons per shell
2, 8, 18, 13, 2
Електронска конфигурација
[Kr] 4d5 5s2
Tc
Technetium was the first element to be produced artificially
Физички Својства
Фаза
Solid
Густина
11,5 g/cm3
Точка на топење
2430,15 K | 2157 °C | 3914,6 °F
Точка на вриење
4538,15 K | 4265 °C | 7709 °F
Топлина на топење
23 kJ/mol
Топлина на испарување
550 kJ/mol
Specific Heat Capacity
-
Abundance in Earth's crust
Нема одговор
Abundance in Universe
Нема одговор
Emilio
Кредити на слика: pauli.uni-muenster.de
Emilio Segrè, one of the discoverer of the element
CAS Number
7440-26-8
PubChem CID Number
Нема одговор
Атомски Својства
Атомски полупречник
136 pm
Ковалентен полупречник
147 pm
Електронегативност
1,9 (Полингова скала)
Ionization Potential
7,28 eV
Atomic Volume
8,5 cm3/mol
Thermal Conductivity
0,506 W/cm·K
Oxidation States
-3, -1, 1, 2, 3, 4, 5, 6, 7
Applications
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
Isotopes
Stable Isotopes
-
Unstable Isotopes
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