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CHEMISTRY NET - INTRODUCTION - LIST OF TOPICS

Chemistry Net - Introduction - Table of Contents CHEMISTRY NET Analytical Chemistry Biological Chemistry Inorganic Chemistry Organic Chemistry Physical & Theoretical Chemistry Chemical News & Interesting / Chem. Data Chemistry is the understanding, the definition and the description of the structure and the behavior of matter, the matter that surrounds us and the matter we are consisting off. It is our history, our life and our future. It is sometimes called the central science because of its role in connecting the other physical sciences (physics, astronomy, earth sciences) with the life sciences (biology, medicine) and engineering. There are many approaches to studying this fascinating science but for convenience and historical reasons has been divided it into five fields: analytical , biological , inorganic , organic and physical chemistry. Chemistry is a challenging subject to teach and even more challenging to learn. This si...
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Periodic Table with Bond Dissociation Enthalpies

Periodic Table with Bond Dissociation Enthalpies Home > Fundamental Physical Constants - Chemical - Physical - Thermochemical Data > Bond Dissociation Enthalpies EH(A-B) > Periodic Table with Bond Dissociation Enthalpies Periodic Table with Bond Dissociation Enthalpies EH(A-A)   Bond dissociation enthalpies (energies) for bonds A-A at 298 K and 1 atm pressure are given in Table 1. Average values of bond dissociation enthalpies of the A-B bond in a series of different compounds are given in the post " Bond Dissociation Enthalpies "   Table 1: Bond Dissociation Enthalpies EH (A-A) (kJ/mol) at 298 K and 1 atm 1 2 3 4 5 6 7 8 9 10 11 12 H 436       ...
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Atomic Radius Periodic Table of the Elements

Atomic Radius Periodic Table of the Elements Home > Fundamental Physical Constants - Chemical - Physical - Thermochemical Data > Ionic Radius Periodic Table of the Elements > Atomic Radius Periodic Table of the Elements Periodic Table with Atomic Radius   Atom size values cannot be specified exactly. These values can be obtained by measuring the distances between atoms in chemical compounds. Measurements of this type have led to the values of atomic radii for the elements shown below.   Table 1: Periodic Table with Atomic Radii (Å) of the elements 1 2 3 4 5 6 7 8 9 10 11 12 H 0.37               ...
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Comparing several group means by one-way ANOVA - Post Hoc tests using SPSS

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Comparing several Group Means by ANOVA using SPSS Home > Statistics – Frequency Distributions, Normal Distribution, z-score s > One-Sample T-Test in Chemical Analysis – Statistical Treatment of Analytical Data > Testing for Normality of Distribution (the Kolmogorov-Smirnov test) > Comparing several Group Means by ANOVA using SPSS > Comparing several Group Means by Anova - Post Hoc Tests using SPSS Comparing of several Group Means by One-Way ANOVA using SPSS - Post Hoc Tests In a previous post entitled "Comparing several Group Means by One-Way Anova using SPSS" the one-way ANOVA test was presented. An example was given where the situation encountered was to compare mean results for the concentration of an analyte obtained by threel different methods. The dependent variable was the mean analytical results (labeled Analytical_Result_g ) while the independent variable was the method used (labeled Method ...
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Ionic Radius Periodic Table of the Elements

Ionic Radius Periodic Table of the Elements Home > Fundamental Physical Constants - Chemical - Physical - Thermochemical Data > Ionic Radius Periodic Table of the Elements Periodic Table with Ionic Radius   Ion size plays an important role in determining the structure and stability of ionic solids, the properties of ions in aqueous solution, and the biological effects of ions. As with atoms, it is impossible to define precisely the sizes of ions . Ionic radii are determined from the measured distances between ion centers in ionic compounds. A table of ionic radii is given below.   Table 1: Periodic Table with Ionic Radii (Å) of the elements 1 2 3 4 5 6 7 H 1.46             ...
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