Krypton

Statistics:

• Name: Krypton
• Symbol: Kr
• Classification: Noble Gas
• Atomic Number: 36
• Atomic Mass: 83.798 g/mol
• Density: 3.48 g/cm³
• Melting: -156.6°C
• Boiling: -152.3°C
• Protons & Electrons:36
• Neutrons:48
• Discovered: 1898
• Discovered By: Ramsay and Travers
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Electrons Per Energy Level:

• Level 1: 2
• Level 2: 8
• Level 3: 18
• Level 4: 8

Isotopes:

Isotope: Half-life

• ⁷⁸Kr: stable
• ⁷⁹Kr: 35.04 hours
• ⁸⁰Kr: stable
• ⁸¹Kr: 2.29e+5 years
• ⁸²Kr: stable
• ^83m1Kr: stable
• ⁸³Kr: 1.83 hours
• ⁸⁴Kr: stable
• ⁸⁵Kr: 10.756 years
• ^85m1Kr: 4.480 hours
• ⁸⁶Kr: stable
• ⁸⁷Kr: 76.3 minutes
• ⁸⁸Kr: 2.84 hours
• ⁸⁹Kr: 3.15 minutes
• ⁹⁰Kr: 32.32 seconds

Brief Summary

Krypton is a Noble Gas with the symbol 'Kr' and contains 36 Protons & Electrons with 48 neutrons in the nucleus of the atom. Krypton has an atomic mass of 83.798 g/mol and, at a temperature of 20°C, has a density of 3.48 g/cm³. It will melt at a temperature of -156.6°C and boil at -152.3°C.

Krypton was discovered by Ramsay and Travers in 1898 and is named 'Krypton' Greek word "kryptos" meaning "hidden".

Some common usages for Krypton: lighting.

Definitions and Notes

Density listed is at a temperature of 20°C.

Isotopes are forms of an element who have the same atomic number but different mass because they contain different number of neutrons.

Half-life is the time required for a quantity of a subject to fall to half of its current quantity.

MLA Citing Format

Krypton :: Kr :: 36 - Chemical Element. 11 Mar. 2010 <http://www.chemicalelement.com/element/krypton.html>.