Name ionic compounds, including polyatomic ions

Answer Key - Grade 10 Science Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.

1. 1.

   Calcium nitrate has 2 nitrate ions per formula unit, each with 3 oxygen atoms. How many oxygen atoms are in one formula unit, Ari?

   6 atoms
3. 2.

   On the card, what does each bracket stand for, Jun?

   • One calcium ion
   • One nitrate ion
   • One oxygen atom
4. 3.

   On the card, why are there two nitrate brackets, Kira?

   Use the picture in question 2.

   • Calcium has two shells
   • Nitrogen atoms come in pairs
   • Two 1− ions balance one 2+
5. 4.

   On the card, why is it named calcium nitrate and not calcium nitride, Luz?

   Use the picture in question 2.

   • Calcium is named last
   • The whole NO₃ unit is nitrate
   • Nitride is the name for two nitrogens
6. 5.

   What is the name of NaCl, Milo?

   • Sodium chloride
   • Chlorine sodide
   • Sodium chlorine
7. 6.

   What is the name of MgO, Noah?

   • Magnesium dioxide
   • Magnesium oxide
   • Magnesium oxygen
8. 7.

   What is the name of CaCl₂, Pia?

   • Calcium chloride
   • Dicalcium chloride
   • Calcium dichloride
9. 8.

   What is the name of the ion CO₃²⁻, Ren?

   • Carbide
   • Carbon trioxide
   • Carbonate
10. 9.

    What is the name of the ion OH⁻, Tala?

    • Hydride
    • Oxide
    • Hydroxide
11. 10.

    What is the name of the ion NH₄⁺, Zee?

    • Ammonium
    • Ammonia
    • Nitride