Technetium – element 43

CONTENTS
I. History of discovery 107
II. Identification of the isotopes of element 43 108
III. Possible natural occurrence of radioactive technetium isotopes 109
IV. Electronic configuration and valence states of technetium 110
V. Elemental technetium 110
VI. Properties of metallic technetium 111
VII. Compounds of technetium(VII) 111
VIII. Compounds of technetium(VI) 113
IX. Compounds of technetium(V) 113
X. Compounds of technetium(IV) 113
XI. Compounds of technetium in +3, +2, +1, and –1 oxidation states 113
XII. Methods for the isolation of radioactive technetium isotopes 114
XIII. Applications of technetium 114