Tc
Technetium
العنصر 43 · 98.0 u
Technetium was the first artificially produced element and has no stable isotopes.
Physical Properties
| الكتلة الذرية | 98.0 u |
| الكثافة | 11.5 g/cm³ |
| Melting Point | 2430.0 K |
| نقطة الغليان | 4538.0 K |
| المظهر | Shiny gray metallic |
| State at Room Temp | Solid |
الخواص الكيميائية
| السالبية الكهربائية | 1.9 (Pauling) |
| طاقة التأين الأولى | 702.0 kJ/mol |
| القرب الإلكتروني | 53.0 kJ/mol |
| Oxidation States | +1, +2, +3, +4, +5, +6, +7 |
الخصائص الذرية
| تشكيل الإلكترون | [Kr] 4d5 5s2 |
| نصف قطر الذرة | 136.0 pm |
| نصف قطر التكافؤ | 147.0 pm |
| Van der Waals Radius | 209.0 pm |
اكتشاف
| اكتشفها | Carlo Perrier, Emilio Segre |
| سنة الاكتشاف | 1937 |
| الموقع | Palermo, Italy |
| Named After | Greek 'technetos' meaning artificial |
عن Technetium
Technetium is a silvery-gray radioactive metal. It was the first element produced artificially, by bombarding molybdenum with deuterons. Technetium-99m is the most widely used isotope in medical diagnostic imaging.
Uses & Applications
Medical imaging (Tc-99m in SPECT scans), nuclear medicine diagnostics, and steel corrosion inhibitor.
حقيقة مضحكة
Technetium was the first artificially created element, and tiny traces have been found in nature from spontaneous uranium fission.
النظائر
| Mass Number | الوفرة | نصف العمر | Stable |
| 97 | - | 4.21 million years | No |
| 98 | - | 4.2 million years | No |
| 99 | - | 211,100 years | No |
تشكيل الإلكترون
[Kr] 4d5 5s2