What is the smallest unit of matter?

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Multiple Choice

What is the smallest unit of matter?

Explanation:
The basic building block that defines a pure element and has its properties is the atom. An atom is the smallest unit that can retain the characteristics of that element, with a nucleus and electrons surrounding it. Molecules are larger groups formed when atoms bond together—like a water molecule, which contains two hydrogen atoms and one oxygen atom. So while molecules exist, they are composed of atoms and are not the smallest units themselves. Cohesion is a force describing how molecules attract each other, not a unit of matter. Subatomic particles exist, but in this context the smallest unit that preserves an element’s identity is the atom.

The basic building block that defines a pure element and has its properties is the atom. An atom is the smallest unit that can retain the characteristics of that element, with a nucleus and electrons surrounding it. Molecules are larger groups formed when atoms bond together—like a water molecule, which contains two hydrogen atoms and one oxygen atom. So while molecules exist, they are composed of atoms and are not the smallest units themselves. Cohesion is a force describing how molecules attract each other, not a unit of matter. Subatomic particles exist, but in this context the smallest unit that preserves an element’s identity is the atom.

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