Frank ICSE Solutions for Class 9 Chemistry - Atomic Structure PAGE NO :113 Solution 1:Solution 2:Solution 3:(a) Mass of an atom - Protons and neutrons (b) Size of an atom - ElectronsSolution 4:Three fundamental particles of an atom are-Proton Electron NeutronSolution 5:(a) An atom - An atom is the smallest particle of an … [Read more...] about Frank ICSE Solutions for Class 9 Chemistry – Atomic Structure