Build an Atom - English

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Build an atom using protons, neutrons and electrons. Identify an element and its position on the periodic table. Determine whether an atom is neutral or an ion. Predict the charge. Determine the mass of an atom or ion. Determine the stability of atom/ion created. Explain element symbol, charge, atomic number, mass number and isotope. Relate the number of protons, neutrons and electrons to atomic symbol.