Tc
INTRODUCTION
Technetium does not occur in nature, and was the first man-made element.Minute quantities of the element have since been detected in uranium ores.
Many of its isotopes are now known. The isotope with the longest half-life, 4.2 million years, has a mass number of 98.
BASIC INFORMATIONS
- Atomic Number
- 43
- Atomic Mass
- 98
- Atomic radius
- 0.134
- Ionization energy
- 703
- Electronic config
- 2,8,18,13,2
- Principal Valency
- +2
- Density g/cm³
- 11.5
- Melting point °C
- 2157
- Boiling point °C
- 4265
- Type of Element
- Metal
- Electronegativity
- 1.9
- Element Category
- Manganese Group
- Appearance
- N/A
- Block
- d-block
- Period
- 5
- Group
- 7
- No of Isotopes
- 34
- Occurrence
- Artifically made
- Abundance in ppm
- 0
- Year of Discovery
- 1936
EXTRACTION
It is extracted by oxidation to its oxide which is volatile
OXIDATION STATES
+7,+6,+5,+4,+3,+2,+1,-1,-3 (Strongly Acidic)
MAJOR SOURCE
Bombardment of Molybdenum with neutron
EXAMPLES OF COMPOUND PRESENT
Ammonium pertechnate, technetium oxide, Potassium pertechnate
ECONOMIC IMPORTANCE
* Compounds and alloys containing technetium oxide can prevent the corrosion of iron by water.
* Technetium-99 is used for imaging in medicine.
* Its metal has no commercial uses.
