Section Self-Check
1. MAINIDEA Compare the stability of a lithium atom with that of its ion, Lit.
2. Describe two different causes of the force of attraction in a chemical bond.
3. Apply Why are all of the elements in group 18 relatively unreactive, whereas those
in group 17 are very reactive?
4. Summarize ionic bond formation by correctly pairing these terms: cation, anion,
electron gain, and electron loss.
5. Apply Write out the electron configuration for each atom. Then, predict the
change that must occur in each to achieve a noble-gas configuration.
a. nitrogen
b. sulfur
c. barium
d. lithium
6. Model Draw models to represent the formation of the positive calcium ion and the
negative bromide ion.
Jon Formation
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