Final answer:
The Lewis symbols of the ions in the given ionic compounds and the Lewis symbols of the atoms from which they are formed are as follows: a) NaCl: Na+ and Cl-, Na and Cl; b) MgO: Mg2+ and O2-, Mg and O; c) KBr: K+ and Br-, K and Br; d) CaS: Ca2+ and S2-, Ca and S.
Step-by-step explanation:
The Lewis symbol, also known as the Lewis dot structure, represents the valence electrons of an atom or ion in a chemical bond. In an ionic compound, the Lewis symbol of an ion includes the symbol of the element and the number of valence electrons. Here are the Lewis symbols for the ions in each of the given ionic compounds:
- NaCl: Na+ and Cl-
- MgO: Mg2+ and O2-
- KBr: K+ and Br-
- CaS: Ca2+ and S2-
The Lewis symbol of an atom is the symbol of the element with the valence electrons represented as dots around it. The Lewis symbols of the atoms from which the ions are formed in the given ionic compounds are:
- Na: Na
- Mg: Mg
- K: K
- Ca: Ca