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How many hydrogen atoms and how many oxygen atoms are present in a single molecule of water (H_2O)? (Choose the correct pair of numbers for hydrogen and oxygen atoms, respectively.)
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2. Atoms & Elements
The Atom
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The form of oxygen that combines three oxygen atoms into each molecule is called ____.
A
superoxide
B
dioxygen
C
ozone
D
peroxide
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Understand that oxygen exists in several allotropes, which are different forms of the same element with distinct molecular structures.
Recognize that the most common form of oxygen is dioxygen, which consists of two oxygen atoms per molecule, represented as O\_2.
Identify that superoxide and peroxide refer to specific oxygen-containing ions or radicals, not molecular forms of elemental oxygen.
Recall that ozone is the allotrope of oxygen composed of three oxygen atoms per molecule, represented as O\_3.
Conclude that the form of oxygen combining three oxygen atoms into each molecule is called ozone.
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