STRONTIUM, CERIUM, THALLIUM, AND FRANCIUM

STRONTIUM

• Metallic silver rock
• The symbol is Sr
• Solid at room temperature
• Grey and silver

STRONTIUM HISTORY

• Adair Crawford
• 1790
• Scotland

STRONTIUM USES

• Used to make brilliant red colors in fireworks and flare guns.

CERIUM PROPERTIES

• Symbol is Ce
• Solid at room temperature
• Black with brown color
• Atomic weight is 140.116

CERIUM HISTORY

• Wihelm Von Hisinger, Jöns Berzelius, and Martin Klaprothin
• 1803
• At Sweden, Germany

CERIUM USES

• Cerium makes flints for lighters, a component of self cleaning ovens, and incandescent lantern mantles.

THALLIUM

• The element symbol is Tl
• Solid at room temperature
• The color is silvery white
• Extremely toxic

THALLIUM HISTORY

• Discovered spectroscopicly by Crookes and Lamy
• 1861
• Discovered in England

THALLIUM USES

• Thallium is used in infrared optic materials, electronics in photoresistors, and in the medical field to help with stress.

FRANCIUM PROPERTIES

• The element symbol is Fr
• A solid at room temperature
• A metallic color

FRANCIUM HISTORY

• Marguerite Perey
• 1939
• Curie Institute in Paris, France

FRANCIUM USES

• Due to the small amounts produced, there are job uses for Francium outside of basic scientific research.