Meaning of TECHNETIUM in English
Atomic number: 43
Atomic weight: [ 98 ]
Group in periodic table: 7
Period in periodic table: 5
Block in periodic table: d-block
CAS registry ID: 7440-26-8
Since its discovery, searches for the element technetium in terrestrial materials have been made without success. Technetium has been found in the spectrum of S-, M-, and N-type stars, and its presence in stellar matter is leading to new theories of the production of heavy elements in the stars.
Technetium is a silvery-grey metal that tarnishes slowly in moist air. Until 1960, technetium was available only in small amounts. The chemistry of technetium is related to that of rhenium.
Chemistry of the elements English vocabulary. Английский словарь химии элементов. 2012