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Glucose, a form of sugar, has the formula C₆H₁₂O₆. Which elements are included in this compound, and how many atoms of each are present?
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4. Atoms and Elements
The Atom (Simplified)
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In the simplified model of matter, can a particle be a single atom?
A
No; a particle must always be electrically charged (an ion).
B
No; a particle must always contain at least two atoms bonded together.
C
No; a particle is always a mixture of different atoms.
D
Yes; a particle can be a single atom (for example, a helium atom).
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Understand the definition of a particle in the context of chemistry: a particle can be any small unit of matter, including atoms, ions, or molecules.
Recall that an atom is the smallest unit of an element that retains the chemical properties of that element.
Recognize that a particle does not have to be charged; it can be neutral, such as a single atom like helium.
Note that particles can be single atoms, ions (charged atoms or molecules), or molecules (two or more atoms bonded together).
Conclude that since a single atom (e.g., helium) can exist independently as a particle, the correct statement is that a particle can be a single atom.
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