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Unformatted text preview: 5. What is the significance of the atomic number, Z, above each atomic symbol in the periodic chart? 6. What do all nickel (Ni) atoms have in common? 7. How is the mass number, A, (left-hand superscript next to the atomic symbol) determined? 8. What structural feature is different in isotopes of a particular element? 9. a) What feature distinguishes a neutral atom from an ion? b) How is the charge on an ion determined? 10. Where is most of the mass of an atom, within the nucleus or outside of the nucleus? Explain your reasoning. 11. Complete the following table: Isotope Atomic Number Z Mass Number A Number of electrons 31 P 15 18 O 8 19 39 18 58 Ni 2+ 58...
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- Fall '11