Question detail
In a dot and cross diagram for ammonia (NH3), how many pairs of electrons are shared between nitrogen and hydrogen?
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. One pair
- B. Two pairs
- C. Three pairs
- D. No pairs
Answer
One pair
Explanation
In ammonia, nitrogen shares one pair of electrons with each of the three hydrogen atoms, resulting in three single covalent bonds.
Common mistake
Common Mistake in Dot and Cross Diagrams
Students often confuse the representation of shared electrons in dot and cross diagrams, incorrectly showing them as separate rather than shared between atoms.
Emphasize that in dot and cross diagrams, shared pairs of electrons should be represented clearly between the two atoms involved, indicating that they are being shared.
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