1.Previous
3.Next

lies between manganese and rhenium in group 7 of the periodic table, and its chemical properties are intermediate between the two. The most common naturally occurring isotope is ⁹⁹Tc, in traces only.

Many of technetium's properties had been predicted by Dmitri Mendeleev before it was discovered; Mendeleev noted a gap in his periodic

1.Previous
3.Next