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10 Cards in this Set
- Front
- Back
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Democritus
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The first person to determine that all things must be made up of smaller parts called atoms.
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John Dalton
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The scientist who proposed modern atomic theory.
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nucleus
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The center of an atom, containing meutrons and protons.
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neutrons
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Particles with no electrical charge.
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protons
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Positively charged particles.
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electrons
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Negatively charged particles.
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compound
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A combination of two or more elements
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hydrogen
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A colorless, odorless, tasteless gas.
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particles
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Very small bits.
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atomic
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Related to atoms.
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