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| 1 | |
Thomson's model of the atom included negative __________ embedded in a ball of __________ charge.
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| | A) | protons, negative |
| | B) | electrons, positive |
| | C) | electrons, negative |
| | D) | protons, positive |
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| 2 | |
Why were so few alpha particles strongly deflected in Rutherford's experiment?
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| | A) | The nucleus is not concentrated enough to deflect all alpha particles. |
| | B) | Alpha particles move too quickly to be deflected very often. |
| | C) | Alpha particles are attracted to the negative clouds of the atoms. |
| | D) | Atomic nuclei are very small, so few alpha particles impact them. |
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| 3 | |
How were alpha particles detected in Rutherford's experiment?
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| | A) | The rays created by the moving alpha partilces were observed. |
| | B) | The sounds of the impacting alpha particles were counted. |
| | C) | The impacts of the alpha particles on a fluorescent screen was observed. |
| | D) | The change in mass of the ZnS screen was measured. |
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| 4 | |
In natural waste-disposal processes, atoms are __________.
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| | A) | created |
| | B) | destroyed |
| | C) | made into aluminum |
| | D) | recycled |
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| 5 | |
The number of protons in the nucleus of the atoms of an element determines the element's __________.
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| | A) | atomic number |
| | B) | atomic mass |
| | C) | mass number |
| | D) | valence |
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| 6 | |
The electrons around an atom form an __________ __________.
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| | A) | electron sphere |
| | B) | electron cloud |
| | C) | atomic sphere |
| | D) | atomic cloud |
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| 7 | |
These two particles are found in atomic nuclei.
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| | A) | protons and neutrons |
| | B) | protons and electrons |
| | C) | neutrons and electrons |
| | D) | electrons and positrons |
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| 8 | |
Because light always moves at the same speed, the wavelength of light is determined by its __________.
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| | A) | amplitude |
| | B) | crest |
| | C) | trough |
| | D) | frequency |
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| 9 | |
What electromagnetic waves have a longer wavelength than visible light?
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| | A) | tv signals |
| | B) | gamma rays |
| | C) | x-rays |
| | D) | ultraviolet |
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| 10 | |
Lavoisier came to the conclusion that air is a mixture made up mostly of these two gases.
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| | A) | nitrogen and oxygen |
| | B) | oxygen and carbon dioxide |
| | C) | hydrogen and oxygen |
| | D) | oxygen and methane |
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