ELEMENTS

PHYSICAL PROPERTIES

• Indium symbol- In
• Solid at room temperature
• Color is a slivery-white

HISTORY

• Discovered by Ferdinand Reich and Hieronymous Theodor Richter
• Discovered in 1863
• Discovered in mines around Frieberg, Saxony

INFO ABOUT INDIUM

• No common uses

THULIUM

PHYSICAL PROPERTIES

• Pure thulium has a bright slivery luster
• Slowly tarnishes in air and reacts with water
• Can be cut with a knife

HISTORY

• Discovered by Swedish scientist Per Teodor Cleve
• Discovered in 1879
• No info on where it was discovered

INFO ABOUT ELEMENT

• Portable X-ray devices use thulium that has been bombarded in a nuclear reactor as a radiation source