Compare and contrast isotopes and atoms ?
Isotopes are variations of a given element which has different number of neutrons, for example, Carbon-12(naturally occurring carbon) and Carbon-14(a radioactive isotope of carbon which has 2 extra neutrons in its nucleus).
Atoms are very small particles made up of protons, neutrons, and electrons and make up everything around us. The protons and neutrons are in turn made of quarks, which are the elementary building blocks which make them up. Electrons are a type of lepton, which are, like quarks, truly elementary, meaning they are the smallest possible unit which makes up something.