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SolutionsIonic Compounds

1. Write the formulas

Write the formula of the ionic compound formed by:

  1. Sodium and oxygen
  2. Magnesium and chlorine
  3. Calcium and oxygen
  4. Aluminium and fluorine
  1. Na2O (Na+ and O2−)
  2. MgCl2 (Mg2+ and Cl−)
  3. CaO (Ca2+ and O2−)
  4. AlF3 (Al3+ and F−)

The positive and negative charges must balance.

2. Balance the reaction

Balance the reaction of sodium with chlorine: Na + Cl2 → NaCl

2 Na + Cl2 → 2 NaCl

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