Continues to stand as the world's leading source of scientific dataIncorporates eight new tables and forty revised or updated tablesIncludes the latest data for Fundamental Physical ConstantsFills important gaps in previous editions with the inclusion of new sections such as Bond Lengths in Organometallic Compounds The latest edition of the world's most popular scientific reference features tables and reference sections on everything from the Periodic Table to the bond lengths in organometallic compounds. Featuring the latest facts and figures, the CRC Handbook of Chemistry and Physics contains all the most frequently used data in science, including the periodic table of the elements, basic constants and units, and geophysical data.For decades, physicists and chemists have turned to this handbook as their primary source for reliable data. Every year, material is critically evaluated, new data is added, and existing tables are updated. The 81st edition includes eight new and forty revised or updated tables. Nowhere else will you find such a useful compilation of scientific data. Don't be left behind. Your research deserves the best data available - the CRC Handbook of Chemistry and Physics has it.Tables new in the 81st edition:· Melting Point Index of Organic Compounds· Boiling Point Index of Organic Compounds· Electrical Conductivity of Water· Properties of Liquid Helium· Bond Length in Organometallic Compounds - filling an important gap in previous editions· Organic Magnets· Pressure-Volume-Temperature Relationship for Polymer Melts· Characteristics of Human HearingTables updated in the 81st edition:· Fundamental Physical Constants - reflects the first change in these international recommendations in 14 years· Conversion Factors· The Elements - the first major revision in more than five years· Dissociation Constants of Organic Acids and Bases· Dipole Moments of Molecules in the Gas Phase· Threshold Limits for Airborne Contaminants