Question detail
Draw a dot and cross diagram to represent the covalent bonding in a molecule of water (H2O).
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Chemical bonds, ionic, covalent and metallic
Question
Draw a dot and cross diagram to represent the covalent bonding in a molecule of water (H2O).
Answer
In the dot and cross diagram for water, the oxygen atom is represented with six electrons, two of which are shared with two hydrogen atoms. Each hydrogen atom has one electron, and the shared pairs of electrons are shown as overlapping circles, with the oxygen's electrons as dots and the hydrogen's as crosses.
Explanation
This question tests the student's ability to represent covalent bonding visually using dot and cross diagrams, specifically for a common molecule like water. It assesses understanding of electron sharing in 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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