Multiple Choice
Which of the following is the correct name for the compound formed between magnesium and sulfur?
2
views
3. Chemical Reactions
Naming Ionic Compounds
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple 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.
2:11mWatch next
Master Ionic Compounds Naming with a bite sized video explanation from Jules
Start learningRelated Videos
Related Practice
Naming Ionic Compounds practice set
Problem sets built by lead tutorsExpert video explanations