Multiple Choice
Which of the following is the correct name for the compound formed between magnesium and sulfur?
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3. Chemical Reactions
Naming Ionic Compounds
Multiple Choice
Which of the following is the correct formula for the most stable oxide of francium?
A
Fr\(_2\)O\(_3\)
B
FrO\(_2\)
C
Fr\(_2\)O
D
FrO
Verified step by step guidance1
Step 1: Understand the position of francium (Fr) in the periodic table. Francium is an alkali metal in Group 1, which means it typically forms +1 oxidation state ions.
Step 2: Recall that alkali metals usually form oxides where the metal has a +1 charge and oxygen has a -2 charge. The oxide ion is O\(^{2-}\).
Step 3: To balance the charges, determine the ratio of francium ions (Fr\(^{+}\)) to oxide ions (O\(^{2-}\)). Since each Fr has a +1 charge and O has a -2 charge, two Fr\(^{+}\) ions are needed to balance one O\(^{2-}\) ion.
Step 4: Write the formula based on the charge balance: two Fr\(^{+}\) ions combine with one O\(^{2-}\) ion, giving the formula Fr\(_2\)O.
Step 5: Compare this formula with the options given and confirm that Fr\(_2\)O is the correct formula for the most stable oxide of francium.
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