What are six interesting info about technetium?

Answer 1

Atomic number: 43
Standardized atomic weight: 98
Appearance: silver gray
State of matter: solid transition metal
Melting point: 2 157 0C
Boiling point: 4 265 0C
Density: 11 g/cm3
Heat of fusion: 32,9 kJ/mol
Molar heat capacity: 24,27 kJ/mol
First ionization energy: 702 kJ/mol
Pauling electronegativity: 1,9
Empirical atomic radius: 136 pm
Thermal conductivity: 50,6 W/m.K
Electrical resistivity: 200 nanoohm.m
Paramagnetic
Superconductor: under 7,46 K
Hexagonal close packed structure
Brinell hardness: 151
Electron configuration: [Kr]4d5.5s2 Technetium react with oxygen, halogens, oxygen, sulfur, selenium, tellurium, boron, carbon etc. and can form alloys with metals.
Technetium is dissolved in inorganic acids excepting hydrochloric acid.
The Pauling electronegativity is 1,9. Technetium oxidation states are between -1 and +7; the most usual valences are +3, +4 and +7. Technetium-99m is largely used as tracer in radiodiagnostic.
Technetium-99 is used as standard source for beta radiation. Technetium-95m is used as tracer in environmental studies.

Answer 2

1. Technetium is the first element in the Periodic Table that does not have any stable isotopes.
2. It is a silvery-gray transition metal that is typically produced in nuclear reactors.
3. Technetium is used in medical imaging, specifically in diagnostic tests to examine the heart, brain, and other organs.
4. The element was first artificially produced in 1937.
5. Technetium is found in small quantities in uranium ores and as a byproduct of uranium processing.
6. Its name comes from the Greek word "technetos," meaning artificial.