Answer:
See explanation, all things with "- ionic" are ionic or associated with ionic compounds. a "***" will be added if this also describes things that are not ionic as well
condensed version: 2*, 4*, 5*, 8, 9, 11, 13, 18
Step-by-step explanation:
1.Nonelectrolyte -
2. High boiling point - ionic***
3. Sharing of valence electrons -
4. Molecule - ionic*** (very vague, it's like asking if a fruit is an orange, sometimes it is and sometimes it's not!)
5. Metal + Nonmateal - ionic***
6. Low melting point -
7. Low boiling point -
8. High electronegativity difference - ionic
9. NaCl - ionic
10.Formula unit - ??? Not a term related to ionic compounds
11. AlCl3 - ionic
12. Low electronegativity difference
13. Transfer of valence of electrons - ionic
14. Nonmetal + Nonmetal -
15. H2O -
16. High melting point -
17. CO2 -
18. Electrolyte - ionic