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Who was Niels Bohr? Niels David Henrik Bohr was a physicist and Nobel Prize winner from Denmark who lived and researched from 1885 to 1962. During his lifetime, he worked with some influential researchers such as Heisenberg and Rutherford. One of their research results in the development of a model that makes statements about the…
Thermochemistry Quiz Online
Thermochemistry concepts are essential to learning for every level in chemistry courses. Here, we have compiled many Thermochemistry 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 and engineering students (MDCAT, ECAT, NUST,…
Gaseous State Quiz Online
Gaseous State concepts are essential to learning for every level in chemistry courses. Here, we have compiled many Gaseous State 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 and engineering students (MDCAT,…
History of atom | John Dalton’s atomic theory
According to Greek philosophers, matter is composed of very small particles which cannot be further divided. DEMOCRITUS (460-370BC) named these particles as atoms derived from a Greek word “ATOMOS” which mean indivisible. The ideas of Greek philosophers were not experimental based. In the late 17th century, the quantitative analysis of many substances disclosed that they…
