Answer:
High melting and boiling points and therefore solid at room temperature
A crystalline structure
Ability to dissolve easily in water
Ability to conduct electricity well
Explanation:
The hypothesis mentioned in the question will be something like this
'If a substance is solid at room temperature, has a crystalline structure, dissolves easily in water, and conducts electricity well, then it likely contains ionic bonds. Otherwise, it likely contains covalent bonds'
We can see that all the items selected in the answer box were included in the hypothesis.
