Kr
INTRODUCTION
Krypton is a colourless, odourless gaseous element that makes up a tiny fraction of Earth's atmosphere.It makes up to 0.00031 percent of the atmosphere, and its several compounds were discovered in 1962 and 1963.
It was first isolated in 1898 by fractional distillation of a mixture of the noble gases.
BASIC INFORMATIONS
- Atomic Number
- 36
- Atomic Mass
- 83.798
- Atomic radius
- 0.2
- Ionization energy
- 1351
- Electronic config
- 2,8,18,8
- Principal Valency
- 0
- Density g/cm³
- 0.0031
- Melting point °C
- -157.36
- Boiling point °C
- -153.22
- Type of Element
- Non-metal
- Electronegativity
- N/A
- Element Category
- Noble Gas
- Appearance
- Colourless Gas
- Block
- p-block
- Period
- 4
- Group
- 18
- No of Isotopes
- 33
- Occurrence
- Free Element
- Abundance in ppm
- 1
- Year of Discovery
- 1898
EXTRACTION
It is extracted by fractional distillation of liquid air.
OXIDATION STATES
+2,+1,0
MAJOR SOURCE
Air
EXAMPLES OF COMPOUND PRESENT
N/A
ECONOMIC IMPORTANCE
* Krypton emits a characteristic bright, orange-red color in an electric-discharge tube; which are used in lighting airfields.
* It is used alone or with argon and neon in incandescent bulbs.
