(a) What are the two main parts of which an atom is made of? (b) Where is the nucleus of an atom situated ? (c) What are orbits or shells of an atom ?
The centrally located nucleus
The outer circular orbits.
(b) The nucleus is a centrally located positively charged mass. (c) The circular orbits (shell present) in the space available around the nucleus on which electrons revolve are called orbits or shells of an atom
Solution (A) What Are the Two Main Parts of Which an Atom is Made Of? (B) Where is the Nucleus of an Atom Situated ? (C) What Are Orbits Or Shells of an Atom ? Concept: Fundamental Subatomic Particles Present in an Atom: Electrons, Protons, Neutrons.