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H2O and law of definite proportions?
2 : 16 = 1 : 8. MASS RATIO
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CO2 and CO in law of multiple proportions?
- C O 2 C O
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- 1 : 1 32:16, or 2 : 1
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What are the 5 statements of Dalton's atomic theory? Which parts are true, and false?
- 1. All matter is composed of atoms. (T)
- 2. Atoms of the same element are identical in size, mass, etc (F)
- and atoms of different elements differ in these properties (T)
- 3. Atoms cannot be subdivided, created, or destroyed (F)
- 4. Atoms of different elements combine in simple whole number ratios to form compounds. (T). note: Law of multiple proportions
- 5. In chemical reactions, atoms are combined, separated, or re-arranged. (T)
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What was the result of JJ Thomson's cathode ray experiments?
His experiments strongly supported that particles that make up cathode rays are negatively charged.
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Explain Rutherford's experiment. his conclusions?
He bombarded a piece of gold foil with alpha particles. Apprx 1/8000 of the alpha particles deflected back to the source. He reasoned that the deflected alpha particles must have hit a dense positive bundle of matter -- nucleus, and he concluded that an atom must be mostly empty space.
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electrons have _____ charge compared to its mass.
Large
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Nuclei have ________ densities.
Very high
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