Can you help me with the following Chemistry questions?

Question

1. Which type of chemical bond must be present in an electrolyte? How do you know?

2.Distinguish between different types of ions. Give three examples of each type of ion.

3. Why are ionic solids non-conductors of electricity, but good conductors when metal?

4. What should I do when a question askes me to draw a dot diagram, say for phosphine, PH3?

The reason I can't answer these questions is because I don't recall learning about them last year.

Answer 1

1. Ionic
not metallic, not covalent.
2. positively charged vs. negatively charged: Na+, Cl-
atomic ion vs. molecular ion: K+, (H3C)4N+
single charged vs. multiply charged: OH-, PO4(3-)
3. electrons bounded to each ions in ionic solids, while electrons can move around in metal.
4. Following the instruction to draw a dot diagram