The periodic table/Radon

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Name: Radon atom

Symbol: Rn

Mass: 222

Classification: Group 0 (Noble Gases)

Protons: 86

Electrons: 86

Neutrons: 136

Color: colorless

Discovered in: 1900

Crystal Structure: Cubic

Melting Point: -71.0 °C

Boiling Point: -61.8 °C

Common Uses: producing neutrons for research, radiotherapy (cancer treatment)