Q: What do refrigerator magnets contain that make them stick to a refrigerator door? A:
OPTIONS:
- steel
- zinc
- copper
- iron
iron
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Q: Approximately how much larger is the radius of an atom than that of its nucleus? A:
OPTIONS:
- 1 times
- 1000 times
- 100 times
- 10 times
10 times
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Q: What states that chemical reactions occur when atoms, ions, or molecules collide? A:
OPTIONS:
- disturbance theory
- reaction theory
- elemental theory
- collision theory
collision theory
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Q: Where do oceans absorb gases from? A:
OPTIONS:
- stratosphere
- wind
- sunlight
- atmosphere
atmosphere
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