Multiple Choice
Which of the following substances is an inorganic compound?
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3. Matter and Energy
Classification of Matter
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In the classification of matter, can a single atom be considered a molecule?
A
No; a molecule consists of two or more atoms chemically bonded together.
B
Yes, but only if the atom is part of an ionic compound.
C
No; a molecule must contain at least two different elements.
D
Yes; any single atom is always a molecule.
Verified step by step guidance1
Understand the definition of a molecule: A molecule is formed when two or more atoms are chemically bonded together.
Recognize that a single atom, by itself, does not meet this definition because it is not bonded to any other atom.
Consider the types of chemical bonds: molecules involve covalent bonds between atoms, while ionic compounds consist of ions held together by ionic bonds, not molecules.
Note that a molecule can be made of the same element (like O\_2) or different elements (like H\_2O), but it must have at least two atoms.
Conclude that a single atom alone cannot be classified as a molecule because it lacks the necessary chemical bonds to other atoms.
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