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Stock System Chemistry
The German chemist Alfred Stock proposed the Stock System Chemistry of nomenclature in 1919 for use in the naming of binary compounds, being, with some modifications, universally adopted. This type of inorganic nomenclature consists of naming the compounds using Roman numerals to indicate the oxidation states of some of the compound elements. These Roman numerals…
Mole Chemistry | Mole Concept | Mole Unit
Below are some important points to get clear mole concept, definition of mole chemistry and mole units. Mole can be define as, The atomic mass, molecular mass, ionic mass or formula mass of a substance expressed in grams is called mole of that substance. OR The amount of a substance, which contains 6.02 x 1023…
Wave-Particle Nature of Matter
According to the Planck’s Quantum theory of radiations light shows a dual character, i.e., it behaves both as a material particle and as a wave. This idea was extended to matter particles in 1924 by Louis de-Broglie. According to de-Broglie, all matter particles in motion have a dual character. It means that electrons, protons, neutron,…
Chemistry Mole & Stoichiometry Quiz Online
Chemistry mole & stoichiometry concepts are essential to learning for every level in chemistry courses. Here, we have compiled many chemistry mole and stoichiometry quizzes free for students of grades 11 and 12. We hope you will find this very useful for your regular exam preparations and entry tests at undergraduate levels, particularly for medical…
