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2. IUPAC numerical multiplier - Wikipedia

   en.wikipedia.org/wiki/IUPAC_numerical_multiplier

   The numbers 200-900 would be confused easily with 22 to 29 if they were used in chemistry. khīlioi = 1000, diskhīlioi = 2000, triskhīlioi = 3000, etc. 13 to 19 are formed by starting with the Greek word for the number of ones, followed by και (the Greek word for 'and'), followed by δέκα (the Greek word for 'ten').

3. File:OBJECT COUNTING AND DENSITY CALCULATION USING MATLAB.pdf

   en.wikipedia.org/wiki/File:OBJECT_COUNTING_AND...

   Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

4. Electron counting - Wikipedia

   en.wikipedia.org/wiki/Electron_counting

   Since these compounds tend to be more reactive than compounds that obey their rule, electron counting is an important tool for identifying the reactivity of molecules. While the counting formalism considers each atom separately, these individual atoms (with their hypothetical assigned charge) do not generally exist as free species .

5. Bond valence method - Wikipedia

   en.wikipedia.org/wiki/Bond_valence_method

   The bond valence method or mean method (or bond valence sum) (not to be mistaken for the valence bond theory in quantum chemistry) is a popular method in coordination chemistry to estimate the oxidation states of atoms. It is derived from the bond valence model, which is a simple yet robust model for validating chemical structures with ...

6. Chemical file format - Wikipedia

   en.wikipedia.org/wiki/Chemical_file_format

   IOData is a free and open-source Python library for parsing, storing, and converting various file formats commonly used by quantum chemistry, molecular dynamics, and plane-wave density-functional-theory software programs. It also supports a flexible framework for generating input files for various software packages.

7. Effective atomic number (compounds and mixtures) - Wikipedia

   en.wikipedia.org/wiki/Effective_atomic_number...

   An effective atomic number in this context is equivalent to the atomic number but is used for compounds (e.g. water) and mixtures of different materials (such as tissue and bone). This is of most interest in terms of radiation interaction with composite materials.

8. Chemical table file - Wikipedia

   en.wikipedia.org/wiki/Chemical_table_file

   Chemical table file (CT file) is a family of text-based chemical file formats that describe molecules and chemical reactions. One format, for example, lists each atom in a molecule, the x-y-z coordinates of that atom, and the bonds among the atoms.

9. Atomic ratio - Wikipedia

   en.wikipedia.org/wiki/Atomic_ratio

   The atomic ratio is a measure of the ratio of atoms of one kind (i) to another kind (j). A closely related concept is the atomic percent (or at.%), which gives the percentage of one kind of atom relative to the total number of atoms. [1] The molecular equivalents of these concepts are the molar fraction, or molar percent.