What does the atomic (proton) number tell you?, the number of electrons, the number of protons, the number of neutrons, the number of atoms, What are substances made of only one sort of atom called?, compounds, mixtures, hydrocarbons, elements, Protons and neutrons are found where in the atom?, nucleus, orbit, energy level, electron, The charge on an electron is:, positive, negative, neutral, The charge on a proton is:, positive, negative, neutral, The charge on a neutron is:, positive, negative, neutral, In an atom, the number of protons is the same as the number of:, neutrons, electrons, gluons, fermions, The mass number is the number of:, protons + electrons, neutrons + electrons, protons, protons + neutrons, The maximum number of electrons in the first, second and third shells are:, 8, 8, 8, 2, 8, 4, 2, 8, 8, 2, 8, 6, The unreactive group of elements with a stable arrangement of electrons are:, the noble gases, the alkali metals, the transition metals, the halogens

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