Enzal Heinkl asked:
Are there completely unknown elements on Mars? One would think not because the periodic table has the building blocks of elements everywhere are going to be the same here as on the other side of the universe.
Basically. The same laws of physics apply here as apply on Mars, well we think as least, as everywhere else in the Universe. It would be the same basic elements: carbon, silicon. The same elements but we do get some different mineralogy. The way they are fitting together on Mars is often slightly different to the way it works on Earth.