Practice IB Chemistry Topic S2.2 the Covalent Model with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for S2.2 the Covalent Model and mirrors Paper 1A, 1B, 2 style where relevant.
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Which of the following atoms can form four covalent bonds in a neutral molecule?
Which is correct for the molecule shown?
| Electron domain geometry | Molecular geometry | |
|---|---|---|
| A. | Trigonal bipyramidal | T-shaped |
| B. | Octahedral | T-shaped |
| C. | Octahedral | Trigonal bipyramidal |
| D. | Trigonal bipyramidal | See-saw |
Which is correct for the molecule shown?
| Case | Electron domain geometry | Molecular geometry |
|---|---|---|
| A | Trigonal bipyramidal | T-shaped |
| B | Octahedral | T-shaped |
| C | Octahedral | Trigonal bipyramidal |
| D | Trigonal bipyramidal | See-saw |
Nitrite ion, , is a polyatomic ion involved in biological nitrogen cycles.
Draw two valid Lewis structures for the nitrite ion, including all formal charges.
Calculate the formal charge on each atom in one of the resonance structures.
Explain the nature of the bonding in in terms of resonance.
What is the total number of electrons shared in a triple bond?