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Electrons and nuclei
The familiar planetary model of the atom was proposed by Rutherford in 1912 following experiments by Geiger and Marsden showing that all the mass of an atom was concentrated in a positively charged nucleus. Negatively charged electrons are attracted to the nucleus by the electrostatic force and were considered by Rutherford to 'orbit' it in a same way to the planets round the Sun. It was realized that a proper description of atoms required the quantum theory; although the planetary model remains a useful analogy from the macroscopic world, many of the physical ideas that work for familiar objects must be abandoned or modified at the microscopic atomic level.
In industries 653k is very low temperature so co is the best reducing agent.
why alkanes are called paraffin
The atom of the element having atomic number 14 should have: (1) One unpaired electron (2) Two unpaired electrons (3) Three unpaired electrons (4) Four unpaired electr
Q. Show the Process of ion exchange chromatography? The process of ion exchange chromatography is the most important, effective and rapid method for the separation and purifica
Physical properties of Trihydric alcohols (a) Trihydric alcohol is an odourless, viscous, colourless and hygroscopic liquid. (b) Trihydric alcohol has high boiling point tha
Q. What do you mean by Polymerisation Isomerism? This term is used to describe compounds having same empirical formula but different molecular compositions. The difference from
For a particle confined to a one-dimensional box of length L, determine the probability that the particle is in the central third of the box (the middle section when the box is div
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give one chemical test to distinguish the following pairs of compound ethyl nitrile and nitroetane;benzamide and p-aminobenzonic acid
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