PPT Slide
NIST Chemistry WebBook Searches - May, 2001
Type of search Searches % of Total
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Chemical name 91762 47.9%
Chemical formula 68601 35.8%
CAS registry number 15990 8.3%
Molecular weight 7346 3.8%
Enegy levels: vibrational frequency 2814 1.5%
Chemial structure: applet interface 1439 0.8%
Ionization energy 823 0.4%
Chemical structure: form interface 610 0.3%
Enegy levels: band head energy 589 0.3%
Electron affinity 393 0.2%