Atomic Structure, Periodic Table, Chemical Bonds, Chemical Formulas Worksheet Page 25

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16B
Chemical Formulas
Investigation
Examples of correct and incorrect compounds:
The oxidation number for each element in a compound is counted once for every atom present.
The two iron atoms contribute a total of +6, which is balanced by the -6 from the three oxygen
atoms.
Note: The Special Bonds card has some extra ways compounds can form when two atoms of the
same element bond together, and when hydrogen is involved in unusual ways. The example of
CH
OH (methanol) above uses one of the special bonds that hydrogen can make with carbon.
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Miscellaneous rules and strategies:
The noble gases do not form bonds; therefore they can’t be played. Players may decide at the
start of the game to remove these tiles. As another option, players can choose to turn the noble
gas tiles over, revealing the + symbol. This symbol could be used as a wildcard in which the
player chooses which element the + should represent. The symbol scores no points but allows
the player to complete a molecule. Players must agree on the use of the noble gas tiles before
the game begins.
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