Formal Charge
Chemistry ⇒ Chemical Bonding and Structure
Formal Charge starts at 11 and continues till grade 12.
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See sample questions for grade 11
Calculate the formal charge on each atom in the cyanide ion (CN-).
Calculate the formal charge on each atom in the Lewis structure of HCO3-.
Calculate the formal charge on each atom in the Lewis structure of O2.
Calculate the formal charge on the central atom in SO42-.
Calculate the formal charge on the oxygen atom in the hydroxide ion (OH-).
Calculate the formal charge on the phosphorus atom in PO43-.
Calculate the formal charge on the sulfur atom in H2SO4.
Which atom in the following structure has the highest formal charge? (1) Central atom (2) Terminal atom (3) Both have the same (4) Cannot be determined
Which atom in the following structure has the highest formal charge? (1) Central atom (2) Terminal atom (3) Both have the same (4) Cannot be determined
Which of the following ions has a formal charge of -1 on the central atom? (1) NO3- (2) CN- (3) SO42- (4) HCO3-
Which of the following is NOT a step in calculating formal charge? (1) Count valence electrons in the free atom (2) Count non-bonding electrons (3) Count total electrons in the molecule (4) Count bonding electrons
Which of the following is the best Lewis structure for the carbonate ion (CO32-) based on formal charges? (1) All oxygens -1, carbon +1 (2) Two oxygens -1, one oxygen 0, carbon 0 (3) All oxygens 0, carbon -2 (4) One oxygen -2, two oxygens 0, carbon 0
Fill in the blank: In the Lewis structure of O3, the central oxygen atom has a formal charge of _______.
Fill in the blank: The formal charge on the carbon atom in CO is _______.
Fill in the blank: The formal charge on the central atom in NH4+ is _______.
Fill in the blank: The formal charge on the oxygen atom in H2O2 (hydrogen peroxide) is _______.
True or False: A molecule with all atoms having zero formal charge is always the most stable.
True or False: Formal charge can be used to predict the most likely structure among possible resonance forms.
True or False: Formal charge is a real charge present on the atom in the molecule.
True or False: The formal charge on an atom is always the same as its oxidation number.
