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21 Cards in this Set
- Front
- Back
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Define cause |
The connection between the muscle force and the effect |
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Define science |
The label for giving out how to cause effects |
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What 2 particles have scientist found to be involve in causing lighting |
Protons & electrons |
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Define effects |
Things done by the muscles |
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What is the goal of chemistry |
Finding out how to cause effects on materials |
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Why do minus and plus charges exist ? Why do protons and electrons attract each other but like particles repel? |
We dont know |
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What kind of quantity charges are in an atom |
Protons, nutrons, electrons |
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What name is used for the unit whose location is outlined by a circle? |
Electrons /nucleus |
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(In the golf ball stadium anology) what part of the atom occupies the tiny "golf ball" region? |
Protons (nucleus ) |
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What part of the atom occupies the "stadium" region? |
Electrons |
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Both thompson and rutherford used the same effect to find out the path taken by particles they could not see. What was the effect? |
In order to produce lighr they had to hit a screen |
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Protons and electrons are the same in the amount of force they excert. How do they compare on their resistance to being accelerated (mass)? |
A proton has a mass of 2000 then that of an electron |
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Why are the masses of protons and electrons so different? |
We dont know |
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Name the device that measures the mass of an atom |
Mass spectrometer |
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How are elements and compounds defined? |
Elements have only 1 mass and some atoms compunds have more then 1 mass and atoms |
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What do nutrons attract? |
Protons |
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Where were all the elements on earth ( except hydrogen) produced? |
Stars? They were already there |
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What feature of an atom is given by the top number in its periodic table box? |
The atomic # |
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What is the feature given by the bottom nimber in a periodic table box |
Atomic mass |
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Why is the bottom # sometimes to close to being an integer? |
The number of nutrons is different |
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What name describes two atoms that are the same in proton and electron count but different in neutron count? |
Isotopes |
