Technetium

=__**Technetium**__ = **By John W. and Isaac L.**

**__Symbol__:** Tc **__Atomic Number__:** 43 **__Atomic Mass__:** (98.0) amu **__Melting Point__:** 2157 °C, (2430 K, 3915 °F) **__Boiling Point__:** 4265 °C (4538 K, 7709 °F) **__Number of Protons/Electrons__:** 43 **__Number of Neutrons__:** 55 **__Crystal Structure__:** hexagonal **__Density at 293 K__:** 11 g/cm3 **__Ionic Charge__:** +2 **__Valence Electrons__:** 2 **__Electron Shells__**: 5 **__Color__:** A shiny gray **__Most Common Isotope:__** Technetium-99 <span style="font-family: 'Times New Roman',Times,serif;">**__Family__**: Transition metals <span style="font-family: 'Times New Roman',Times,serif;">**__Uses__:** Used in nuclear medicine and as a gamma ray free source of beta particles <span style="font-family: 'Times New Roman',Times,serif;">**__Interesting Fact__:** Technetium is the smallest radioactive element being #43.