Технициум
43
Tc
Група
7
Периода
5
блок
d
Протони
Електрони
Неутрони
43
43
55
Општи Својства
Атомски број
43
Атомска тежина
[98]
Масен број
98
Категорија
Преоден метал
Боја
Сребро
Радиоактивно
Да
From the Greek word technetos, artificial
Кристална структура
Обично хексагонално
Историја
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.
Електрони на орбитала
2, 8, 18, 13, 2
Електронска конфигурација
[Kr] 4d5 5s2
Technetium was the first element to be produced artificially
Физички Својства
Фаза
Цврста состојба
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
Специфичен топлински капацитет
-
Обилност во Земјината кора
Нема одговор
Обилност во Универзумот
Нема одговор
CAS број
7440-26-8
PubChem CID број
Нема одговор
Атомски Својства
Атомски полупречник
136 pm
Ковалентен полупречник
147 pm
Електронегативност
1,9 (Полингова скала)
Јонизациски потенцијал
7,28 eV
Атомски волумен
8,5 cm3/mol
Топлинска спроводливост
0,506 W/cm·K
Оксидациски состојби
-3, -1, 1, 2, 3, 4, 5, 6, 7
Примени
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
Изотопи
Стабилни изотопи
-Нестабилни изотопи
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