COBALT, ZIRCONIUM, AND SILVER

COBALT

• It is a brittle, hard, silver-grey transition metal
• It is solid at room temperature
• Symbol is Co
• Atomic number is 27

HISTORY OF COBALT

• Discovered by George Brandt
• Discovered in 1735 in Sweden

USES OF COBALT

• It is used in many things: magnet/stainless steels
• Jet turbines
• Paint pigents

ZIRCONIUM

• Has a grayish-white, lustrous color
• Can ignite spontaneously in air
• Solid at room temperature
• Symbol is Zr
• Atomic number is 40

HISTORY OF ZIRCONIUM

• Discovered by Martin Heinrich Klaproth
• Discovered in 1789 in Berlin, Germany
• Has also been discovered in S-type stars, and meteorites

USES OF ZIRCONIUM

• It is used in many things:
• The nuclear industry
• An alloy agent in steel
• Making surgical implants

SILVER

• Has a brilliant white metallic luster
• Alittle harder than gold
• Very ductile and malleable
• Solid at room tempeature
• Symbol is Ag, Atomic number is 47

HISTORY OF SILVER

• Known since ancient times
• People have been using it since 3000 BC
• Thse slag sumps have been found in the Aegean Sea
• Slag dumps found in Asia Minor

USES OF SILVER

• Jewelry
• Silverware
• Dental Hardware
• Coinage metal