ELEMENTS

ATOMIC NUMER 67: HOLMIUM

HOLMIUM: PHYSICAL PROPERTIES

• Name: Holmium
• Symbol: Ho
• Physical State: Solid
• Color: Silvery White

HOLMIUM: HISTORY

• Discovered by: Marc Delafontaine and Jacques-Louis Soret
• When discovered: 1878
• Where discovered: Switzerland

HOLMIUM: USES

• Magnets
• Medical, dental, and fiber-optical application

ATOMIC NUMBER 85: ASTATINE

ASTATINE: PHYSICAL PROPERTIES

• Name: Astatine
• Symbol: At
• Physical State: Solid
• Color: Black

ASTATINE: HISTORY

• Discovered by: Dale R. Corson, Kenneth Ross MacKenzie, and Emilio Segré.
• When discovered: 1940
• Where discovered: California, USA

ASTATINE: USES

• Nuclear Medicine
• Cancer therapy