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15
×
Thomson said that atoms are neutral because ...?
the number of positive protons is equal to the number of negative electrons
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15
×
True or false: Atoms X (Z=20 A=40) and Y (Z=20 A=41) are isotopes.
True
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15
×
True or false: The electron configuration for silicon (Z=14) is 1s2 2s2 2p6 3s1 3p1
False
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×
banana
Go to last place!
Oops!
×
fairy
Take points!
5
10
15
20
25
×
rocket
Go to first place!
Okay!
×
baam
Lose 10 points!
Oops!
15
×
What is the maximum number of electrons in the 4th level?
32
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15
×
Protons have the same mass as ...?
neutrons
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15
×
Dalton believed that atoms of the same element were all the same. In what way are they the same?
They have the same mass, size and properties
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15
×
Did Dalton believe that atoms were soft like pudding or hard little balls?
He believed that they were tiny hard spheres
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×
thief
Give points!
5
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25
×
star
Double points!
Okay!
×
rocket
Go to first place!
Okay!
×
banana
Go to last place!
Oops!
15
×
Rutherford's atomic model is usually known as ...?
the planetary model
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15
×
Is C-14 a radioactive isotope?
True
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25
×
In which sublevel is the last electron of a calcium atom (Z=20)?
3p
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15
×
What did Rutherford call the centre of the atom?
a nucleus
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15
×
True or false: Atoms X (Z=19 A=40) and Y (Z=20 A=40) are isotopes.
False
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×
baam
Lose 15 points!
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×
shark
Other team loses 20 points!
Okay!
×
fairy
Take points!
5
10
15
20
25
×
lifesaver
Give 20 points!
Oops!
15
×
True or false: Isotopes can be stable and unstable.
True
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×
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