chemistry

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            

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                      

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

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             Li 0