Technetium is a transition metal similar to manganese.

Question

what chemical and physical properties would you expect technetium to have?

Answer 1

The same chemical and physical properties as Manganese, which you should look up.

You might start with
http://www.mrteverett.com/Chemistry/pdictable/q_elements.asp?Symbol=Mn

In addition to that, something that the periodic table won't tell you is that all isotopes of Technetium are radioactive.