Multiple Choice
Which subatomic particle is found in the nucleus of an atom and has a positive charge?
2. Atoms & Elements
The Atom
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Which of the following best represents the molecular structure of a water molecule?
A
CO2
B
CH4
C
O2
D
H2O
Verified step by step guidance1
Identify the chemical formula for water, which is H₂O. This indicates that a water molecule consists of two hydrogen atoms and one oxygen atom.
Understand the molecular structure of water: it is a bent or V-shaped molecule due to the two lone pairs of electrons on the oxygen atom, which repel the hydrogen atoms.
Visualize the arrangement: the oxygen atom is at the center, with the two hydrogen atoms bonded to it at an angle of approximately 104.5 degrees.
Recognize that the molecular structure of water is different from linear molecules like CO₂ or tetrahedral molecules like CH₄.
Conclude that the molecular structure of water is unique and best represented by the formula H₂O, distinguishing it from the other options provided.
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