Answer
(a) Ionic.
(b) Molecular.
(c) Molecular.
(d) Ionic.
Work Step by Step
- Classify the elements in the compounds as metals or nonmetals.
** Metal + nonmetal = Ionic compound
** Nonmetal + Nonmetal = Molecular compound.
(a) $Li$: Metal; $Br$: Nonmetal.
Therefore, they make an ionic compound.
(b) $Si$: Nonmetal; $Cl$: Nonmetal.
Therefore, they make a molecular compound.
(c) $B$: Nonmetal; $F$: Nonmetal.
Therefore, they make a molecular compound.
(d) $Ca$: Metal. $O$: Nonmetal.
Therefore, they make an ionic compound.
