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. was the hypothesis, repeated above, completely supported? justify your answers.

If a substance is solid at room temperature, has a crystalline structure, dissolves easily in water and conduce electricity well, then such a substance contains AN IONIC BOND.

Ionic compound and covalent compounds are formed in different ways, ionic bonds are formed by donation of electrons while covalent bonds are formed by sharing of electrons, due to this fact, the compounds containing these two chemical bonds have different distinguishing properties.

All the properties given in the question above are characteristics of ionic compounds; the only exception is the state of matter of the substance. Just like ionic compounds, covalent compounds too can be solid at room temperature. But covalent compound can not conduct electricity and they do not have crystalline structure.

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."