Subscription Info   Newsletter   Site Demo   Librarians   Help/FAQs   About   Contact Us    Search Options   Log In

< Back Krypton  SEE PERIODIC TABLE   SEE FULL ARTICLE Atomic Number 36 Atomic Symbol Kr Atomic Weight 83.80 amu Group Noble Gas, 18 Form Gas Density @ STP 3.677 g/L Melting Point -157.36 °C (-251.248 °F, 115.79 °K) Boiling Point -153.22 °C (-243.796 °F, 119.93 °K) Heat of Fusion 1.37 kJ/mol Heat of Vaporization 9.08 kJ/mol First Ionization Potential 13.99961 eV Specific Heat Capacity 0.248 J/g K Ground State Electron Configuration 4p6 Oxidation States 0 Stable Isotopes and Natural Abundance on Earth 78Kr, 0.35%; 80Kr, 2.25%; 82Kr, 11.61%; 83Kr, 11.5%; 84Kr, 57.0%; 86Kr, 17.3% Selected Radioisotopes 81Kr Atomic Radius 88 pm Crystal Structure Cubic Discovered by Ramsay; Travers, 1898

Copyright ©2008 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use and Privacy Notice. Additional credits and copyright information.