Self-Test Quiz: Covalence Numbers & Formal Charges

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1. In neutral compounds, the covalence number for carbon is


2. In neutral compounds the covalence number of hydrogen is


3. In neutral compounds, the covalence number of nitrogen is


4. In neutral compounds, the covalence number for oxygen is


5. In the ammonium ion, the covalence number for nitrogen is four. Therefore the formal charge on the nitrogen must be


6. In the cyanide ion, carbon participates in three covalent bonds (a triple bond) and bears a lone pair of electrons. The formal charge on carbons is


7. Laughing gas, NNO, has ______ covalent bonds.

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