Rubidium

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Rubidium

• By R. H.

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General Knowledge

• Name Rubidium
• Group Alkali metals- period 5 group 1
• Atomic Weight 85.4678
• Symbol Rb
• Atomic Number 37
• of electrons in each shell 2,8,18,8,1
• Discovered 1861 by Robert Wilhem Bunsen
• Density At 293 K 1.53 g/cm3

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States

• State Solid
• Melting Point 312.09 K
• Boiling Point 961 K
• Heat of fusion 2.192 kJ/mol
• Heat of Vaporization 72216 kJ/mol

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Appearances Characteristics

• Color Silvery- White
• Uses Photocells
• Hardness 0.3 mohs
• Characteristics Soft
• Structure BBC- Body-centered cubic

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Protons, neutrons and electrons

• Protons 37
• Electrons 37
• Neutrons 48

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About Rubidium

• The cost is 25/gram
• Ignites spontaneously in air and reacts violently
  in water.
• Used in vacum tubes and special glasses and film
  batteries

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Resources

• http//www.chemicool.com/elements/rubidium.html
• http//periodic.lanl.gov/elements/37.html