Atoms are composed of three particles with an electric charge: electrons, protons and uncharged neutrons. Electrons have a negative charge, and protons have a positive charge. The negative charge of ...

www.physicsmodels.in offers new type of videos chapter-wise and for important topics for Class X to XII syllabus. Inside the video, is a combination of 3D Animations technology as well as 3D pictures.

THIS is a new and considerably enlarged edition of a book which we have previously noticed (December 21, 1893). We then declared our belief in the writer as one capable of stating with all clearness ...