Define Complex A complex is a molecule or ion formed by a central metal atom or ion surrounded by one or more ligands A ligand is a species that contains one or more lone pairs of electrons The lig...
Define Ligand A ligand is a molecule or ion that has one or more lone pairs of electrons These lone pairs of electrons are donated by the ligand, to form dative covalent bonds to a central metal at...
Transition Elements: Ligands & Complex Formation Transition element ions can form complexes which consist of a central metal ion and ligands Copper(II) and cobalt(II) ions will be used as examp...
Effects of the 3d & 4s Subshells on Oxidation States of the Transition Elements Transition elements can have variable oxidation states These variable oxidation states can be formed as the 3d an...
Define Transition Element Transition elements are d-block elements which form one or more stable ions with an incomplete d subshell They are all metals found in the d-block of the Periodic Table, b...
Effect of Ionic Radius on Thermal Stability of Group 2 Nitrates & Carbonates The Group 2 nitrates and carbonates become more thermally stable going down the group The charge density of the cati...
Homogeneous & Heterogeneous Catalysis Catalysts increase the rate of reaction by providing an alternative pathway which has a lower activation energy Catalysts can be either homogeneous or hete...
ssat阅读怎么学？很多同学在做SSAT题目的初期都很不适应，多数会与托福阅读产生比较。SSAT是一种测试学术能力的考试，在阅读上就体现为对考生理解能力的考查，考查的要求也不仅仅是看懂文章，而是要求真正理解文...
Effect of Temperature on the Rate Constant At higher temperatures, a greater proportion of molecules have energy greater than than the activation energy Since the rate constant and rate of reaction...
