Writing Formulas for Covalent Compounds
A Grade 11 chemistry worksheet on understanding and writing chemical formulas for covalent compounds, focusing on prefixes and naming conventions.
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Writing Formulas for Covalent Compounds
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Read each question carefully and provide the best answer. Remember the rules for naming and writing formulas for covalent compounds.
Covalent compounds are formed when two nonmetals share electrons. The chemical formula for a covalent compound indicates the number of atoms of each element present in the molecule. Prefixes are used to denote the number of atoms.
1. Covalent compounds are formed between two atoms.
2. When writing chemical formulas for covalent compounds, numerical prefixes are used to indicate the number of of each element.
3. The prefix for 'two' is .
4. The compound with the formula CO is named carbon .
5. The second element in a binary covalent compound always ends with the suffix .
6. What is the correct chemical formula for dinitrogen pentoxide?
N5O2
N2O5
N2O
NO5
7. What is the name of the compound with the formula PCl3?
Phosphorus chloride
Phosphorus trichloride
Triphosphorus chloride
Monophosphorus trichloride
Write the chemical formula for each of the following covalent compounds:
8. Sulfur dioxide
9. Carbon tetrachloride
10. Dihydrogen monoxide
11. Nitrogen trifluoride
Write the name for each of the following covalent compounds:
12. N2O4
13. SF6
14. SiO2
15. HBr
16. The prefix 'mono' is always used for the first element in a covalent compound if there is only one atom.
True
False
17. The compound N2O is named dinitrogen monoxide.
True
False