ELECTROSCOPE Invented by the British physician William Gilbert around 1600, the electroscope is one of the most important instruments used by scientists for the past many years to study electricity. What is an Electroscope? An electroscope is a scientific device that is used to detect the presence of an electric charge on a body. Working […]

MODERN ELECTRON THEORY An atom consists of a central part called nucleus and around the nucleus (called extra-nucleus) there are a number of electrons revolving in different paths or orbits. The nucleus contains protons and neutrons. A proton is a positively charged particle while a neutron has no charge. Therefore, the nucleus of an atom