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15
×
A certain element has 12 neutrons and 11 protons. Assume this element has an overall neutral charge. What is the identity of this element?
Sodium (Na)
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15
×
Is the following a chemical or physical change: cutting a pumpkin to make jack-o-lantern
Physical
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15
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How many atoms are in 2(Ge2O3)?
10
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15
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In a neutral atom, the number of protons is _____ compared to the number of electrons.
In a neutral atom, the number of protons is equal to the number of electrons.
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15
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Atomic number is equal to the number of ________.
protons
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heart
Other team wins 25 points!
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star
Double points!
Okay!
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fairy
Take points!
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25
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thief
Give points!
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lifesaver
Give 25 points!
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gold
Win 50 points!
Okay!
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fairy
Take points!
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25
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thief
Give points!
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15
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During a tug-of-war competition, neither team is able to gain an advantage. What is true about the forces?
The forces are balanced
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baam
Lose 10 points!
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shark
Other team loses 25 points!
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rocket
Go to first place!
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baam
Lose 25 points!
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15
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Why do noble gases have such a low reactivity?
Their outer shells of their electron clouds are full.
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15
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New substances formed during a chemical reaction are on the _____ side and are called ______
Right side; Products
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15
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Is the following a chemical or physical change: Ice melting
Physical
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seesaw
Swap points!
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magnet
Take 15 points!
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fairy
Take points!
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25
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thief
Give points!
5
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25
15
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How do you calculate the number of neutrons in an element?
Mass - Atomic Number = Neutrons
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15
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What group contains the Noble Gases?
Group 18
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15
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What is the law of conservation of mass?
Matter cannot be created or destroyed
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