1) The central part of an atom that contains protons and neutrons. a) Proton b) Neutron c) Compound d) Nucleus 2) A small particle with a positive charge of +1 and a relative mass of 1. a) Element b) Proton c) Atom d) Compound 3) A small particle with no electronic charge and a relative mass of 1. a) Nucleus b) Electron c) Neutron d) Proton 4) A very tiny particle with a negative charge of -1 and a relative mass close to 0. a) Nucleus b) Proton c) Electron d) Compound 5) Atoms have an overall positive charge. a) True b) False

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