DEAD OR ALIVE
 SYMBOL Dy
 Dysprosium has a metallic, bright silver lustre.
 It is relatively stable in air at room temperature, but dissolves readily, with the evolution of hydrogen, in mineral acids.
 The metal is soft enough to be cut with a knife and can be machined without sparking if overheating is avoided. It is a rare earth metal
 Atomic Number 66 Atomic Mass 162.50
 Period 6 Group Name Lanthanoid
 66 protons 66 electrons 97 neutrons