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20
×
Which gas diffuses the fastest?
Hydrogen (least atomic mass)
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15
×
Is evaporation or condensation endothermic?
Evaporation. Heat is added to turn a liquid to a gas, heat is removed to turn a gas into a liquid = condensation (exothermic)
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monster
Reset all scores!
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shark
Other team loses 25 points!
Okay!
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rocket
Go to first place!
Okay!
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thief
Give points!
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25
15
×
Which state of matter has a fixed volume but not a fixed shape
Liquid
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eraser
Reset score!
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gift
Win 20 points!
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fairy
Take points!
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25
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thief
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25
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Name the three sub-atomic particles and their charges
Protons (+) electrons (-), neutrons (no charge)
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15
×
Is melting endothermic or exothermic?
Endothermic. Heat is taken in. Amount of heat in the substance increases
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15
×
Which gas diffuses faster ammonia or hydrogen chloride?
Ammonia, less molecular mass
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lifesaver
Give 25 points!
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star
Double points!
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shark
Other team loses 10 points!
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thief
Give points!
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25
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seesaw
Swap points!
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rocket
Go to first place!
Okay!
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fairy
Take points!
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25
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lifesaver
Give 15 points!
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15
×
At what temperature does water vapor become water?
100 degrees C. Same temp that water becomes water vapor bp=cp
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10
×
What is freezing point?
When a substance changes from liquid to solid
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10
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Are melting point and freezing point the same?
Yes
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15
×
how many electrons can the first electron shell hold?
2
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10
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What is melting point?
When a substance changes from solid to liquid
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15
×
What is meant by a volatile liquid?
It has a low boiling point, it easily condenses
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