Multiple Choice
Which part of an atom contains the protons and neutrons?
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2. Atoms & Elements
The Atom
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Which atoms combine to form a molecule of water?
A
Two hydrogen atoms and one oxygen atom
B
One hydrogen atom and two oxygen atoms
C
One hydrogen atom and one oxygen atom
D
Two oxygen atoms and two hydrogen atoms
Verified step by step guidance1
Understand that a molecule of water is composed of specific atoms bonded together to form H2O.
Recall the chemical formula for water, which is H2O, indicating the number of each type of atom in one molecule.
Interpret the formula H2O: the subscript '2' after H means there are two hydrogen atoms, and the absence of a subscript after O means there is one oxygen atom.
Conclude that a water molecule consists of two hydrogen atoms and one oxygen atom bonded together.
Verify that this matches the correct answer choice: 'Two hydrogen atoms and one oxygen atom.'
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