The answer to the first one is C. Strong attraction between ions
The answer to the second one is A. High melting points
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Answer: 1) C. Strong attraction between ions.
2) A. High melting points
Explanation: Ionic compounds are formed by combination of positively charged ions called cations formed by less electronegative metals and negatively charged ions called anions formed by more electronegative nonmetals.
The cations and anions with opposite charges are bonded through strong coloumbic forces and thus are difficult to break and have high melting points and thus exist as solids at room temperature.
[tex]Na:11:[Ne]3s^1[/tex]
[tex]Na^+:10:[Ne][/tex]
[tex]Cl:17:[Ne]3s^23p^5[/tex]
[tex]Cl^-:18:[Ne]3s^23p^6[/tex]
[tex]Na^++Cl^-\rightarrow NaCl[/tex]
