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15
×
___________ is an example of a non-metal.
helium
oxygen
krypton
all of these
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15
×
Elements in group 13 have _____ valence electrons.
3
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eraser
Reset score!
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×
star
Double points!
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×
gift
Win 25 points!
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lifesaver
Give 20 points!
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15
×
Germanium (Ge) is found in group ________ and in the ________ period.
14th group, 4th period.
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15
×
Alkali metals are found in ______ of the periodic table
group 1 (minus hydrogen)
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monster
Reset all scores!
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fairy
Take points!
5
10
15
20
25
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fairy
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5
10
15
20
25
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banana
Go to last place!
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15
×
Which of the following elements is NOT a member of the boron group?
Silicon
Boron
Gallium
Aluminum
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15
×
The atomic number of oxygen is __________.
8
15.999
9
16
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15
×
noble gases are typically ________ because they have a full outer shell of _____________.
stable, valence electrons
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15
×
Term for a row in the periodic table
period
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15
×
Mendeleev arranged that elements in his periodic table in order of __________
atomic mass (Mass)
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15
×
Which of the following pairs is unrelated?
Hydrogen - Alkali Metal
Boron - Metalloid
Fluorine - Halogen
Gold - Transition Metal
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lifesaver
Give 5 points!
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seesaw
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fairy
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15
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25
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banana
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15
×
Elements that form a bridge between elements on the left and right sides of the periodic table
transition elements
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15
×
Carbon-12 and Carbon-14 would be considered as __________.
isotopes of carbon
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15
×
All atoms of the same element have the same number of _______, but can have different numbers of ________.
protons, neutrons
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