Comprehensive data on the chemical element Technetium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Technetium. Common chemical compounds are also provided for many elements. read more
So it has valency 7. As it is an element belongs to d block it shows various valencies. Titanium belongs to Mn group so according to that it has valency +7 to +1 and -1 also. With the oxidation state -3 it act as strongly acidic oxide. read more
Technetium is a chemical element with symbol Tc and atomic number 43. It is the lightest element whose isotopes are all radioactive; none are stable, excluding the fully ionized state of 97 Tc. Nearly all technetium is produced synthetically, and only about 18000 tons can be found at any given time in the Earth's crust. read more