Atomic Structure, Periodic Table, Chemical Bonds, Chemical Formulas Worksheet Page 23
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2516B
Chemical Formulas
Investigation
3. Form the compound with your tiles and write the chemical formula for each
compound based on the number of tiles of each element
Table 1: Writing chemical formulas for binary compounds
element 1
element 2
oxidation
oxidation
number of
number of
chemical
no. 1
no. 2
tiles of
tiles of
formula
element 1
element 2
hydrogen
fluorine
magnesium
sulfur
calcium
bromine
aluminum
oxygen
potassium
chlorine
lithium
argon
rubidium
sulfur
D
Naming compounds
Naming binary ionic compounds is very simple if you follow these rules:
1. Write the name of the element with a positive oxidation number first.
2. Write the root name of the element with a negative oxidation number second. For
example, chlor- is the root name of chlorine. Subtract the -ine ending.
3. Add the ending -ide to the root name. Chlor- becomes chloride.
Using these rules, write the name of each of the compounds in Table 1.
E
Playing Compound Crossword
Now that you understand how elements combine to form compounds, you are ready to play
Compound Crossword. In this game, you will score points by forming stable compounds,
crossword style. Players use the oxidation numbers of the elements to form correct compounds.
Points are determined by adding up the atomic numbers of each atom in the compound.
3
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