Can you answer the question above I am not sure of my answer

Why sncl2 is solid while sncl4 is liquid at room temprature explain it in easy way

When can a hypothesis be elevated to the status of a theory? a) when it is validated by an experiment b) when data gathered from an experiment precisely fits predictions c) when it can be proved to be true d) when it meets the test of repeated experimentation

At what temperature will a solid melt ?