Multiple Choice
Approximately what percentage of the matter in the universe is comprised of atoms?
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2. Atoms & Elements
The Atom
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Which of the following is the smallest particle of an element that retains the chemical properties of that element?
A
Atom
B
Molecule
C
Electron
D
Proton
Verified step by step guidance1
Understand the question: It asks for the smallest particle of an element that retains the chemical properties of that element.
Recall definitions: An atom is the basic unit of an element that maintains its chemical identity and properties.
Consider other options: A molecule is made of two or more atoms bonded together, so it is larger than an atom.
Electrons and protons are subatomic particles; individually, they do not retain the chemical properties of the element.
Conclude that the atom is the smallest particle that retains the chemical properties of an element.
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