Answer :
Final answer:
a. The chemical formula for the ionic compound formed between X and Z, where X has two valence electrons and Z has seven valence electrons, is XZ₂.
b. The chemical formula for the ionic compound formed between X and Z, where X has one valence electron and Z has six valence electrons, is XZ.
c. The chemical formula for the ionic compound formed between X and Z, where X has three valence electrons and Z has five valence electrons, is X₃Z₅.
d. The chemical formula for the ionic compound formed between X and Z, where X has six valence electrons and Z has two valence electrons, is X₃Z₂.
Explanation:
The formation of an ionic compound involves the transfer of electrons from one element (usually a metal) to another (usually a nonmetal) to achieve a stable electron configuration. In each case, the chemical formula of the ionic compound can be determined by balancing the charges of the ions formed by X and Z.
For option a, since X has two valence electrons, it will lose these electrons to form a cation with a +2 charge (X²⁺), and Z will gain these two electrons to form an anion with a -1 charge (Z⁻). Therefore, the chemical formula is XZ₂, where X is in a 2+ oxidation state and Z is in a 1- oxidation state.
For option b, X will lose its single valence electron to form a cation with a +1 charge (X⁺), and Z will gain this electron to form an anion with a -1 charge (Z⁻). Hence, the chemical formula is simply XZ.
For option c, X will lose its three valence electrons to form a cation with a +3 charge (X³⁺), and Z will gain these electrons to form an anion with a -3 charge (Z³⁻). Thus, the chemical formula is X₃Z₅, where X is in a 3+ oxidation state and Z is in a 3- oxidation state.
For option d, X will lose its six valence electrons to form a cation with a +6 charge (X⁶⁺), and Z will gain two of these electrons to form an anion with a -2 charge (Z²⁻). Therefore, the chemical formula is X₃Z₂, where X is in a 6+ oxidation state and Z is in a 2- oxidation state.
