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Teams
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thief
Give points!
5
10
15
20
25
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fairy
Take points!
5
10
15
20
25
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fairy
Take points!
5
10
15
20
25
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lifesaver
Give 5 points!
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15
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What is 'oxidation number'?
a number with a +/- sign that represents the number of electrons that an atom would gain or lose when it forms a compound
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15
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Non-metals have POSITIVE/NEGATIVE oxidation numbers when they form an ionic bond with a metal.
negative
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15
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Name this compound: OBr2
oxygen (II) bromide
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15
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What do we call this compound? KF
potassium flouride
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Why do atoms form compounds?
To become stable by gaining, loosing or sharing electrons
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15
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Which group of elements is the most reactive? Why?
Group 17; they only need 1 electron to become stable
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Ionic bonds happen betweem METAL/NON-METAL and METAL/NON-METAL elements.
metal and non-metal
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Name this compound: AuF
gold fluoride
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What type of bond will form between Na and F?
ionic
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What is an OXYGEN HALIDE?
a combination of oxygen with an atom from the halogen group (group 17)
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What is the correct formula for calcium iodide?
CaI2
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What type of bond will form between N and O?
covalent
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Name this compound K2S
potassium sulfide
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baam
Lose 15 points!
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seesaw
Swap points!
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rocket
Go to first place!
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lifesaver
Give 20 points!
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seesaw
Swap points!
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star
Double points!
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rocket
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lifesaver
Give 20 points!
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