Lewis dot diagram for the Cs1+ ion

Explanation:

Cesium Lewis dot structure would look like this:

·Cs,  because it only has one valence electron. But, since it has a plus, that means we lost an electron. So, we have to get rid of the dot and you have:

i think that the answer is c

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.