Question detail
Which of the following is a limitation of dot and cross diagrams for covalent structures?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Chemical bonds, ionic, covalent and metallic
Question
- A. They do not show the three-dimensional arrangement of atoms.
- B. They cannot represent ionic bonds.
- C. They only depict the outer-shell electrons.
- D. They are not useful for large molecules.
Answer
The correct option is They do not show the three-dimensional arrangement of atoms.. This answer is correct because it matches the approved learning objective to deduce a molecular formula from a model or diagram showing atoms and bonds in the subtopic Covalent bonding.
Explanation
The correct option is They do not show the three-dimensional arrangement of atoms.. They do not show the three-dimensional arrangement of atoms. is correct because it directly supports the approved learning objective to deduce a molecular formula from a model or diagram showing atoms and bonds. This belongs to the subtopic Covalent bonding within Chemical bonds, ionic, covalent and metallic, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Covalent bonding.
Common mistake
Incorrect Molecular Formula Deduction
Students often confuse the number of atoms in a molecule, leading to incorrect molecular formulas.
Carefully count the atoms of each element in the model or diagram to ensure the correct molecular formula is deduced.
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