<span>Sodium chloride is an example of an ionic compound. An ionic compound is composed of a positively charged cation and a negatively charged anion that are held together by their attractive forces. For table salt, Sodium chloride, Sodium is the cation and Chloride is the anion. </span>
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Well first i just wanna say that life on mars has been discovered,not little green men but Bactria found on the surface and small traces of water have been found as well. some forms of life need little water to survive (like bacteria) but they still need water so yes there is water on mars the question is will we find it.
Answer:
the challenges they would expect to see is the plants not having water or air
planted need water to have photosynthesis and since theres no water in space and little to no atmosphere the plants would suffocate