HELIUM

HELIUM

• Element symbol - He
• Atomic mass - 4.003
• Atomic number - 2
• Gas

HELIUM

• Boiling point -268.93C
• Melting point -272.20C

HELIUM

• Discovered October 20,1868
• Norman Lockyer and Edward Frankland
• France
• From Helios (Greek for Sun)

HELIUM

HELIUM

HELIUM

HELIUM FAMILY VIIIA

• Neon
• Argon
• Krypton

USES

• Filling balloons
• The study of quantum mechanics
• Welding shielding gas
• Air blimps
• Cooling superconductors

WHERE IT IS FOUND

• Stars
• Natural gas wells in USA

INTERESTING FACTS

• "Quantum fluid"
• Lowest melting point and boiling point
• Can defy gravity
• Greatest thermal conductivity