krypton [Kr]

Introduction

From the Greek kryptos meaning hidden. Discovered in 1898 by William Ramsay & Morris Travers.

Occurrence

• obtained from fractional distillation of liquid air
• found in air at about 1 ppm

Characteristics

• colorless relatively inert gaseous element

Uses

electric lamps

More general terms

• inert gas (noble gas, rare gas)

Additional terms

• periodic table