Grade 9 Chemistry: Naming Compounds
A worksheet for Grade 9 Science students to practice naming ionic and covalent compounds.
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Grade 9 Chemistry: Naming Compounds
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Read each question carefully and provide the best answer. Remember the rules for naming ionic and covalent compounds.
Naming Ionic Compounds
1. In an ionic compound, the metal is always named and the nonmetal ending is changed to .
2. When a metal can form more than one cation, a numeral is used to indicate the charge of the metal ion.
3. Name the following ionic compounds:
a) NaCl
b) MgCl₂
c) Fe₂O₃
d) Cu(NO₃)₂
4. Write the chemical formula for the following ionic compounds:
a) Potassium iodide
b) Calcium oxide
c) Lead(II) chloride
d) Ammonium sulfate
Naming Covalent Compounds
5. Prefixes are used in naming covalent compounds to indicate the number of atoms of each element.
True
False
6. The prefix 'mono-' is always used for the first element in a covalent compound if there is only one atom.
True
False
7. Name the following covalent compounds:
a) CO₂
b) N₂O₄
c) PCl₅
d) SO₃
8. Write the chemical formula for the following covalent compounds:
a) Dihydrogen monoxide
b) Sulfur hexafluoride
c) Carbon tetrachloride
d) Nitrogen trihydride
9. Which of the following is the correct name for the ionic compound KBr?
Potassium bromine
Potassium bromide
Potassium(I) bromide
Bromine potasside
10. What is the chemical formula for dinitrogen pentoxide?
NO₅
N₂O₅
N₅O₂
N₂O
11. Explain the key differences in the naming conventions for ionic and covalent compounds. Provide an example for each.