In which of the following pairs of compounds are both members of the pair ionic compounds? Explain
a. Pl3 and HBr
b. H2S and NCl3
c. LiF and H20
d. LiI and NiO
To determine if compounds are ionic or not, we need to understand the difference between ionic and covalent compounds.
Ionic compounds are formed by the transfer of electrons from one atom to another, resulting in the formation of ions. The ions are then attracted to each other by electrostatic forces, creating a crystal lattice structure. Covalent compounds, on the other hand, are formed by the sharing of electrons between atoms.
Now let's analyze each pair of compounds:
a. Pl3 and HBr:
Pl3 (phosphorus trichloride) is a covalent compound because it consists of nonmetals (phosphorus and chlorine) which share electrons.
HBr (hydrogen bromide) is also a covalent compound because it contains two nonmetals (hydrogen and bromine) that share electrons.
Therefore, neither Pl3 nor HBr is an ionic compound.
b. H2S and NCl3:
H2S (hydrogen sulfide) is a covalent compound because it consists of nonmetals (hydrogen and sulfur) which share electrons.
NCl3 (nitrogen trichloride) is also a covalent compound because it contains a nonmetal (nitrogen) and a halogen (chlorine), both of which share electrons.
Therefore, neither H2S nor NCl3 is an ionic compound.
c. LiF and H2O:
LiF (lithium fluoride) is an ionic compound because it consists of a metal (lithium) and a nonmetal (fluorine) that transfer electrons, resulting in the formation of ions which are then held together by electrostatic forces.
H2O (water) is a covalent compound because it consists of nonmetals (hydrogen and oxygen) that share electrons.
Therefore, only LiF is an ionic compound in this pair.
d. LiI and NiO:
LiI (lithium iodide) is an ionic compound because it consists of a metal (lithium) and a nonmetal (iodine) that transfer electrons, resulting in the formation of ions.
NiO (nickel oxide) is also an ionic compound because it contains a metal (nickel) and a nonmetal (oxygen) that transfer electrons.
Therefore, both LiI and NiO are ionic compounds in this pair.
In conclusion, the correct answer is option d. LiI and NiO, where both compounds are ionic compounds.