What are “tiny building blocks of matter”?

Question: What are “tiny building blocks of matter”?

Options:

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Correct answer:

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7 little words

1. Two-door Plymouth model
2. Bruise around the eye
3. Roosting rod 7 Little Words
4. Easy mark 7 Little Words
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6. Hairstyle 7 Little Words
7. Painter Jackson 7 Little Words
8. 1940s Fairey aeroplane
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