Question

which of the following best describes an ionic compound? a compound formed by sharing electrons between nonmetals a compound made only of nonmetals with equal electronegativity a compound formed by combining neutral atoms without charge a compound formed by the transfer of electrons between metals and nonmetals question 2 which pair of ions would form an ionic compound with the formula cacl₂? ca²⁺ and cl₂⁺ ca²⁺ and cl⁻ ca⁺ and cl⁺ ca⁺ and cl₂⁻

Explanation:

• For the first question:
• Ionic compounds are formed by the transfer of electrons from metals (which lose electrons to form cations) to non - metals (which gain electrons to form anions).
• Option A describes covalent compounds (formed by electron sharing between non - metals).
• Option B: Compounds made of non - metals with equal electronegativity would have a non - polar covalent bond (if they share electrons), not an ionic bond.
• Option C: Ionic compounds are formed from ions (charged species), not neutral atoms.
• For the second question:
• In \(CaCl_{2}\), calcium (\(Ca\)) has a common oxidation state of \(+ 2\) (loses 2 electrons to form \(Ca^{2+}\)).
• Chlorine (\(Cl\)) has a common oxidation state of \(-1\) (gains 1 electron to form \(Cl^{-}\)).
• Using the criss - cross method (where the magnitude of the charge of one ion becomes the subscript of the other ion), for \(Ca^{2+}\) and \(Cl^{-}\), we get \(CaCl_{2}\).
• Option A: \(Cl_{2}^{+}\) is not a valid ion (chlorine typically forms \(Cl^{-}\) in ionic compounds).
• Option C: \(Ca^{+}\) is not the common ion for calcium (common is \(Ca^{2+}\)).
• Option D: \(Cl_{2}^{-}\) is not a valid ion (chlorine forms \(Cl^{-}\) in ionic compounds).

Answer:

First question: A compound formed by the transfer of electrons between metals and nonmetals.
Second question: \(Ca^{2 + }\) and \(Cl^{-}\).